Enable tempest-full on stable/pike

Add stable/pike on tempest-full.
The job will be voting on stable/pike so we need bitrot
jobs on Tempest master as well. Not the py3 since it was
not running on Pike yet.

Once this lands we can add bitrot jobs to d-g as well,
and filter the legacy job out of pike in the integrated
templates.

Depends-on: https://review.openstack.org/545258/
Change-Id: I1ac0e54eab22786575e11f4d34b7e15e643038c4

.zuul.yaml

@@ -29,10 +29,11 @@
 - job:
     name: tempest-full
     parent: devstack-tempest
-    # This currently works from stable/queens on.
+    # This currently works from stable/pike on.
     branches:
       - master
       - stable/queens
+      - stable/pike
     description: |
       Base integration test with Neutron networking and py27.
       Former names for this job where:
@@ -77,6 +78,11 @@
     parent: tempest-full-py3
     override-checkout: stable/queens
 
+- job:
+    name: tempest-full-pike
+    parent: tempest-full
+    override-checkout: stable/pike
+
 - job:
     name: tempest-tox-plugin-sanity-check
     parent: tox
@@ -182,6 +188,16 @@
               - ^setup.cfg$
               - ^tempest/hacking/.*$
               - ^tempest/tests/.*$
+        - tempest-full-pike:
+            irrelevant-files:
+              - ^(test-|)requirements.txt$
+              - ^.*\.rst$
+              - ^doc/.*$
+              - ^etc/.*$
+              - ^releasenotes/.*$
+              - ^setup.cfg$
+              - ^tempest/hacking/.*$
+              - ^tempest/tests/.*$
         - tempest-tox-plugin-sanity-check
     gate:
       jobs:
@@ -190,3 +206,4 @@
       jobs:
         - tempest-full-queens
         - tempest-full-queens-py3
+        - tempest-full-pike