Enable NOVA_USE_SERVICE_TOKEN in nova-next job for Pike

We want to start testing a feature added to nova which
sends a service user token along with the regular user
token to other services like cinder and neutron during
long-running operations. This relies on a change in
devstack and we only run it on branches after stable/ocata.

Change-Id: Iee859b3a09066dcbc60583210b4107b787f0d79a
Depends-On: I2d7348c4a72af96c0ed2ef6c0ab75d16e9aec8fc

jenkins/jobs/nova.yaml

@@ -54,6 +54,7 @@
 # -----------------------
 # Newton: Created job; placement and cells v2 were optional.
 # Ocata: placement and cells v2 are default and required.
+# Pike: Enabled send_service_user_token.
 - job-template:
     name: '{pipeline}-tempest-dsvm-neutron-nova-next-full-{node}{suffix}'
     node: '{node}'
@@ -83,6 +84,13 @@
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
           fi
+
+          # NOTE(mriedem): NOVA_USE_SERVICE_TOKEN is available starting in Pike
+          stable_compare="stable/[a-o]"
+          if [[ ! "$ZUUL_BRANCH" =~ $stable_compare ]] ; then
+              export DEVSTACK_LOCAL_CONFIG+=$'\n'"NOVA_USE_SERVICE_TOKEN=True"
+          fi
+
           function post_test_hook {{
               if [ -f $BASE/new/nova/tools/hooks/post_test_hook.sh ]; then
                   $BASE/new/nova/tools/hooks/post_test_hook.sh

zuul/layout.yaml

@@ -3543,10 +3543,11 @@ jobs:
     voting: false
 
   # NOTE(mriedem): The nova-next job runs placement + cells v2 + neutron
-  # which were all optional in newton but are defaults in ocata+ so we can
-  # restrict the job to just running on stable/newton changes.
+  # which were all optional in newton but are defaults in ocata+. In Pike we
+  # made the job run with send_service_user_token so we want to run against
+  # stable/newton and Pike (current master), but skip stable/ocata.
   - name: gate-tempest-dsvm-neutron-nova-next-full-ubuntu-xenial-nv
-    branch: stable/newton
+    branch: ^(stable/newton|master)$
 
   - name: ^gate-swift3-tox-s3tests_
     voting: false