Turn on devstack exercises for neutron (non-voting)

Currently devstack exercises are not working for havana neutron.
This makes it very difficult to write the required grenade job
for neutron.

This patch turns devstack exercises on for neutron in check,
jobs enabling devstack exercise failures to be tracked.
There is a provision to add this job to periodic jobs in the
future.

Change-Id: Id177bc58cdaf78dddece1ac1ac137cc03d32bd9c

modules/openstack_project/files/jenkins_job_builder/config/devstack-gate-periodic-jobs.yaml

@@ -427,6 +427,35 @@
       - email:
           recipients: openstack-stable-maint@lists.openstack.org
 
+- job-template:
+    name: 'periodic-devstack-dsvm-neutron{branch-designator}'
+    node: '{node}'
+
+    wrappers:
+      - timeout:
+          timeout: 90
+          fail: true
+      - timestamps
+
+    builders:
+      - devstack-checkout
+      - shell: |
+          #!/bin/bash -xe
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_NEUTRON=1
+          export DEVSTACK_GATE_EXERCISES=1
+          export ZUUL_BRANCH={branch-override}
+          unset ZUUL_PROJECT
+          cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh
+          ./safe-devstack-vm-gate-wrap.sh
+      - link-logs
+
+    publishers:
+      - devstack-logs-periodic
+      - console-log-periodic
+      - email:
+          recipients: openstack-stable-maint@lists.openstack.org
+
 
 - job-group:
     name: devstack-periodic-jobs
@@ -446,3 +475,4 @@
       - 'periodic-tempest-dsvm-savanna-full{branch-designator}'
       - 'periodic-tempest-dsvm-savanna-postgres-full{branch-designator}'
       - 'periodic-tempest-dsvm-savanna-neutron{branch-designator}'
+      - 'periodic-devstack-dsvm-neutron{branch-designator}'

modules/openstack_project/files/jenkins_job_builder/config/devstack-gate.yaml

@@ -750,6 +750,36 @@
       - console-log
 
 
+- job-template:
+    name: '{pipeline}-devstack-dsvm-neutron{branch-designator}'
+    node: '{node}'
+
+    wrappers:
+      - timeout:
+          timeout: 120
+          fail: true
+      - timestamps
+
+    builders:
+      - devstack-checkout
+      - shell: |
+          #!/bin/bash -xe
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_NEUTRON=1
+          export DEVSTACK_GATE_EXERCISES=1
+          export BRANCH_OVERRIDE={branch-override}
+          if [ "$BRANCH_OVERRIDE" != "default" ] ; then
+              export ZUUL_BRANCH=$BRANCH_OVERRIDE
+          fi
+          cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh
+          ./safe-devstack-vm-gate-wrap.sh
+      - link-logs
+
+    publishers:
+      - devstack-logs
+      - console-log
+
+
 - job-group:
     name: devstack-gate-jobs
     jobs:
@@ -783,3 +813,4 @@
       - '{pipeline}-tempest-dsvm-savanna-full{branch-designator}'
       - '{pipeline}-tempest-dsvm-savanna-postgres-full{branch-designator}'
       - '{pipeline}-tempest-dsvm-savanna-neutron{branch-designator}'
+      - '{pipeline}-devstack-dsvm-neutron{branch-designator}'

modules/openstack_project/files/zuul/layout.yaml

@@ -117,6 +117,9 @@ jobs:
     parameter-function: single_use_node
   - name: ^(gate|check)-tempest-dsvm-neutron-pg$
     branch: ^(?!stable/grizzly).*$
+  - name: check-devstack-dsvm-neutron
+    branch: ^(?!stable/grizzly).*$
+    voting: false
   - name: ^(gate|check)-tempest-dsvm-neutron-isolated$
     branch: ^(?!stable/grizzly).*$
   - name: ^(gate|check)-tempest-dsvm-neutron-pg-isolated$
@@ -1179,6 +1182,7 @@ projects:
       - check-tempest-dsvm-neutron-pg-isolated
       - gate-tempest-dsvm-neutron-large-ops
       - check-grenade-dsvm-neutron
+      - check-devstack-dsvm-neutron
     gate:
       - gate-neutron-requirements
       - gate-neutron-docs
@@ -1783,6 +1787,7 @@ projects:
       - check-grenade-dsvm
       - check-grenade-dsvm-forward
       - check-swift-dsvm-functional
+      - check-devstack-dsvm-neutron
     gate:
       - gate-devstack-bash8
       - gate-tempest-dsvm-full