Add experimental glusterfs job

Add a job to the experimental pipeline that enables GlusterFS as a
backend for cinder. This change depends on:
    https://review.openstack.org/#/c/143308/

Change-Id: I71c77430d26baacac9c7b15ef4dd9b5df36ca58c

jenkins/jobs/devstack-gate.yaml

@@ -1606,6 +1606,38 @@
       - console-log
 
 
+- job-template:
+    name: '{pipeline}-tempest-dsvm-full-glusterfs{branch-designator}'
+    node: 'devstack-centos7'
+
+    wrappers:
+      - build-timeout:
+          timeout: 125
+      - timestamps
+
+    builders:
+      - link-logs
+      - net-info
+      - devstack-checkout
+      - shell: |
+          #!/bin/bash -xe
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_TIMEOUT=120
+          export DEVSTACK_GATE_TEMPEST=1
+          export DEVSTACK_GATE_TEMPEST_FULL=1
+          export DEVSTACK_GATE_GLUSTERFS=1
+          export BRANCH_OVERRIDE={branch-override}
+          if [ "$BRANCH_OVERRIDE" != "default" ] ; then
+              export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
+          fi
+          cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh
+          ./safe-devstack-vm-gate-wrap.sh
+
+    publishers:
+      - devstack-logs
+      - console-log
+
+
 - job:
     name: gate-devstack-gate-unittests
     node: 'bare-precise || bare-trusty'
@@ -1671,3 +1703,4 @@
       - '{pipeline}-tempest-dsvm-neutron-keystonev3-full{branch-designator}'
       - '{pipeline}-tempest-dsvm-full-ceph{branch-designator}'
       - '{pipeline}-tempest-dsvm-nova-v21-full{branch-designator}'
+      - '{pipeline}-tempest-dsvm-full-glusterfs{branch-designator}'

zuul/layout.yaml

@@ -272,6 +272,7 @@ project-templates:
     experimental:
       - 'check-grenade-dsvm-neutron'
       - 'check-tempest-dsvm-full-ceph'
+      - 'check-tempest-dsvm-full-glusterfs'
 
   - name: integrated-gate-neutron
     check:
@@ -798,6 +799,8 @@ jobs:
     voting: false
   - name: check-tempest-dsvm-full-ceph
     voting: false
+  - name: check-tempest-dsvm-full-glusterfs
+    voting: false
   - name: gate-tomograph-python33
     voting: false
   - name: gate-cliff-requirements