Limit integration jobs to Puppet5

Because we have so many jobs, it's hard to actually land code. Let's
reduce the gating jobs to just Puppet5 as Puppet 4 is nearing EOL.

This change also moves puppet 6 to experimental if we wish to test it
but does not force puppet 6 on all the jobs. It would be beneficial to
switch the puppet 5 jobs out with puppet 6 jobs next cycle as projects
are migrated to the next version.  TripleO is moving to puppet 5 during
the Stein cycle and tenatively looking to puppet 6 in the Train cycle.

Change-Id: I8ae350a149640badc43abc458c65eb0f93e5fb53

zuul.d/layout.yaml

@@ -55,10 +55,6 @@
     name: puppet-openstack-integration-jobs-all
     check:
       jobs:
-        - puppet-openstack-integration-4-scenario001-tempest-centos-7-luminous
-        - puppet-openstack-integration-4-scenario002-tempest-centos-7
-        - puppet-openstack-integration-4-scenario003-tempest-centos-7
-        - puppet-openstack-integration-4-scenario004-tempest-centos-7-mimic
         - puppet-openstack-integration-5-scenario001-tempest-centos-7-luminous
         - puppet-openstack-integration-5-scenario002-tempest-centos-7
         - puppet-openstack-integration-5-scenario003-tempest-centos-7
@@ -67,14 +63,6 @@
         - puppet-openstack-integration-5-scenario002-tempest-ubuntu-bionic
         - puppet-openstack-integration-5-scenario003-tempest-ubuntu-bionic
         - puppet-openstack-integration-5-scenario004-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-6-scenario001-tempest-centos-7-luminous
-        - puppet-openstack-integration-6-scenario002-tempest-centos-7
-        - puppet-openstack-integration-6-scenario003-tempest-centos-7
-        - puppet-openstack-integration-6-scenario004-tempest-centos-7-mimic
-        - puppet-openstack-integration-6-scenario001-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-6-scenario002-tempest-ubuntu-bionic
-        - puppet-openstack-integration-6-scenario003-tempest-ubuntu-bionic
-        - puppet-openstack-integration-6-scenario004-tempest-ubuntu-bionic-mimic
         - puppet-openstack-integration-4-scenario001-tempest-debian-stable-luminous:
             voting: false
         - puppet-openstack-integration-4-scenario002-tempest-debian-stable:
@@ -85,22 +73,12 @@
             voting: false
     gate:
       jobs:
-        - puppet-openstack-integration-4-scenario001-tempest-centos-7-luminous
-        - puppet-openstack-integration-4-scenario002-tempest-centos-7
-        - puppet-openstack-integration-4-scenario003-tempest-centos-7
-        - puppet-openstack-integration-4-scenario004-tempest-centos-7-mimic
         - puppet-openstack-integration-5-scenario001-tempest-centos-7-luminous
         - puppet-openstack-integration-5-scenario002-tempest-centos-7
         - puppet-openstack-integration-5-scenario003-tempest-centos-7
         - puppet-openstack-integration-5-scenario004-tempest-centos-7-mimic
         - puppet-openstack-integration-5-scenario001-tempest-ubuntu-bionic-mimic
         - puppet-openstack-integration-5-scenario002-tempest-ubuntu-bionic
-        - puppet-openstack-integration-6-scenario001-tempest-centos-7-luminous
-        - puppet-openstack-integration-6-scenario002-tempest-centos-7
-        - puppet-openstack-integration-6-scenario003-tempest-centos-7
-        - puppet-openstack-integration-6-scenario004-tempest-centos-7-mimic
-        - puppet-openstack-integration-6-scenario001-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-6-scenario002-tempest-ubuntu-bionic
     experimental:
       jobs:
         - puppet-openstack-integration-5-scenario001-tempest-debian-stable-luminous
@@ -111,91 +89,85 @@
         - puppet-openstack-integration-6-scenario002-tempest-debian-stable
         - puppet-openstack-integration-6-scenario003-tempest-debian-stable
         - puppet-openstack-integration-6-scenario004-tempest-debian-stable-luminous
+        - puppet-openstack-integration-6-scenario001-tempest-centos-7-luminous
+        - puppet-openstack-integration-6-scenario002-tempest-centos-7
+        - puppet-openstack-integration-6-scenario003-tempest-centos-7
+        - puppet-openstack-integration-6-scenario004-tempest-centos-7-mimic
+        - puppet-openstack-integration-6-scenario001-tempest-ubuntu-bionic-mimic
+        - puppet-openstack-integration-6-scenario002-tempest-ubuntu-bionic
+        - puppet-openstack-integration-6-scenario003-tempest-ubuntu-bionic
+        - puppet-openstack-integration-6-scenario004-tempest-ubuntu-bionic-mimic
 
 - project-template:
     name: puppet-openstack-integration-jobs-scenario001
     check:
       jobs:
         - puppet-openstack-integration-5-scenario001-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-6-scenario001-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-4-scenario001-tempest-centos-7-luminous
         - puppet-openstack-integration-5-scenario001-tempest-centos-7-luminous
-        - puppet-openstack-integration-6-scenario001-tempest-centos-7-luminous
         - puppet-openstack-integration-4-scenario001-tempest-debian-stable-luminous:
             voting: false
     gate:
       jobs:
         - puppet-openstack-integration-5-scenario001-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-6-scenario001-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-4-scenario001-tempest-centos-7-luminous
         - puppet-openstack-integration-5-scenario001-tempest-centos-7-luminous
-        - puppet-openstack-integration-6-scenario001-tempest-centos-7-luminous
     experimental:
       jobs:
         - puppet-openstack-integration-5-scenario001-tempest-debian-stable-luminous
         - puppet-openstack-integration-6-scenario001-tempest-debian-stable-luminous
+        - puppet-openstack-integration-6-scenario001-tempest-ubuntu-bionic-mimic
+        - puppet-openstack-integration-6-scenario001-tempest-centos-7-luminous
 
 - project-template:
     name: puppet-openstack-integration-jobs-scenario002
     check:
       jobs:
         - puppet-openstack-integration-5-scenario002-tempest-ubuntu-bionic
-        - puppet-openstack-integration-6-scenario002-tempest-ubuntu-bionic
-        - puppet-openstack-integration-4-scenario002-tempest-centos-7
         - puppet-openstack-integration-5-scenario002-tempest-centos-7
-        - puppet-openstack-integration-6-scenario002-tempest-centos-7
         - puppet-openstack-integration-4-scenario002-tempest-debian-stable:
             voting: false
     gate:
       jobs:
         - puppet-openstack-integration-5-scenario002-tempest-ubuntu-bionic
-        - puppet-openstack-integration-6-scenario002-tempest-ubuntu-bionic
-        - puppet-openstack-integration-4-scenario002-tempest-centos-7
         - puppet-openstack-integration-5-scenario002-tempest-centos-7
-        - puppet-openstack-integration-6-scenario002-tempest-centos-7
     experimental:
       jobs:
         - puppet-openstack-integration-5-scenario002-tempest-debian-stable
         - puppet-openstack-integration-6-scenario002-tempest-debian-stable
+        - puppet-openstack-integration-6-scenario002-tempest-ubuntu-bionic
+        - puppet-openstack-integration-6-scenario002-tempest-centos-7
 
 - project-template:
     name: puppet-openstack-integration-jobs-scenario003
     check:
       jobs:
         - puppet-openstack-integration-5-scenario003-tempest-ubuntu-bionic
-        - puppet-openstack-integration-6-scenario003-tempest-ubuntu-bionic
-        - puppet-openstack-integration-4-scenario003-tempest-centos-7
         - puppet-openstack-integration-5-scenario003-tempest-centos-7
-        - puppet-openstack-integration-6-scenario003-tempest-centos-7
         - puppet-openstack-integration-4-scenario003-tempest-debian-stable:
             voting: false
     gate:
       jobs:
-        - puppet-openstack-integration-4-scenario003-tempest-centos-7
         - puppet-openstack-integration-5-scenario003-tempest-centos-7
-        - puppet-openstack-integration-6-scenario003-tempest-centos-7
     experimental:
       jobs:
         - puppet-openstack-integration-5-scenario003-tempest-debian-stable
         - puppet-openstack-integration-6-scenario003-tempest-debian-stable
+        - puppet-openstack-integration-6-scenario003-tempest-ubuntu-bionic
+        - puppet-openstack-integration-6-scenario003-tempest-centos-7
 
 - project-template:
     name: puppet-openstack-integration-jobs-scenario004
     check:
       jobs:
         - puppet-openstack-integration-5-scenario004-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-6-scenario004-tempest-ubuntu-bionic-mimic
-        - puppet-openstack-integration-4-scenario004-tempest-centos-7-mimic
         - puppet-openstack-integration-5-scenario004-tempest-centos-7-mimic
-        - puppet-openstack-integration-6-scenario004-tempest-centos-7-mimic
         - puppet-openstack-integration-4-scenario004-tempest-debian-stable-luminous:
             voting: false
     gate:
       jobs:
-        - puppet-openstack-integration-4-scenario004-tempest-centos-7-mimic
         - puppet-openstack-integration-5-scenario004-tempest-centos-7-mimic
-        - puppet-openstack-integration-6-scenario004-tempest-centos-7-mimic
     experimental:
       jobs:
         - puppet-openstack-integration-5-scenario004-tempest-debian-stable-luminous
         - puppet-openstack-integration-6-scenario004-tempest-debian-stable-luminous
+        - puppet-openstack-integration-6-scenario004-tempest-ubuntu-bionic-mimic
+        - puppet-openstack-integration-6-scenario004-tempest-centos-7-mimic