introduce experimental ovs-dpdk ci job

- This change creates a new ovs dpdk ci job
  for testing integration of ovs-dpdk with OpenStack.
- This change will enable development of the networking-ovs-dpdk
  devstackgaterc, pre_test_hook.sh and post_test_hook.sh
  files required to correctly deoploy openstack with ovs-dpdk
  in the upstream ci enviornment.

Change-Id: Ibe7dac8da71339fd3a5f42214adab2dcfe10166e

jenkins/jobs/networking-ovs-dpdk.yaml

@@ -0,0 +1,58 @@
+- job-template:
+    name: '{pipeline}-tempest-dsvm-networking-ovs-dpdk{suffix}'
+    node: '{node}'
+
+    wrappers:
+      - build-timeout:
+          timeout: 130
+      - timestamps
+
+    builders:
+      - print-template-name:
+          template-name: "{template-name}"
+      - link-logs
+      - net-info
+      - devstack-checkout
+      - shell: |
+          #!/bin/bash -xe
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_NEUTRON=1
+          export DEVSTACK_GATE_TEMPEST=1
+          export BRANCH_OVERRIDE={branch-override}
+          if [ "$BRANCH_OVERRIDE" != "default" ] ; then
+              export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
+          fi
+          # Because we are testing a non standard project, add
+          # our project repository. This makes zuul do the right
+          # reference magic for testing changes.
+          export PROJECTS="openstack/networking-ovs-dpdk $PROJECTS"
+          # Note the actual url here is somewhat irrelevant because it
+          # caches in nodepool, however make it a valid url for
+          # documentation purposes.
+          export DEVSTACK_LOCAL_CONFIG="enable_plugin networking-ovs-dpdk git://git.openstack.org/openstack/networking-ovs-dpdk"
+
+          # Keep localrc to be able to set some vars in pre_test_hook
+          export KEEP_LOCALRC=1
+
+          function pre_test_hook {{
+              if [ -f $BASE/new/networking-ovs-dpdk/devstack/gate/pre_test_hook.sh ] ; then
+                  . $BASE/new/networking-ovs-dpdk/devstack/gate/pre_test_hook.sh
+              fi
+          }}
+          export -f pre_test_hook
+
+          function post_test_hook {{
+              if [ -f $BASE/new/networking-ovs-dpdk/devstack/gate/post_test_hook.sh ] ; then
+                  . $BASE/new/networking-ovs-dpdk/devstack/gate/post_test_hook.sh
+              fi
+          }}
+          export -f post_test_hook
+
+          export DEVSTACK_GATE_SETTINGS=/opt/stack/new/networking-ovs-dpdk/devstack/gate/devstackgaterc
+
+          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

jenkins/jobs/projects.yaml

@@ -7465,6 +7465,11 @@
 
     jobs:
       - python-jobs
+      - '{pipeline}-tempest-dsvm-networking-ovs-dpdk{suffix}':
+          pipeline: gate
+          node: ubuntu-xenial
+          suffix: '-nv'
+          branch-override: default
 
 - project:
     name: networking-peregrine

zuul/layout.yaml

@@ -12373,6 +12373,8 @@ projects:
     template:
       - name: merge-check
       - name: python-jobs
+    experimental:
+      - gate-tempest-dsvm-networking-ovs-dpdk-nv
 
   - name: openstack/networking-peregrine
     template: