Change node to xenial.

The following aodh commit requires mysql>=5.6.4, causing
vitrage jenkins job failures when trusty node is used.
So we specify xenial node.

f8d3068bd2 (diff-6f7ec000163298dd067c3235a378b765)

Change-Id: Ia74a1eb55f97b13c300cc20c458632c9f9536ecd

jenkins/jobs/projects.yaml

@@ -15355,15 +15355,19 @@
       - 'gate-{name}-python35{suffix}':
           suffix: ''
       - pypi-jobs
-      - '{pipeline}-vitrage-dsvm-{suite}{job-suffix}':
+      - '{pipeline}-vitrage-dsvm-{suite}-{node}{job-suffix}':
           pipeline: gate
-          node: ubuntu-trusty
+          node:
+            - ubuntu-trusty
+            - ubuntu-xenial
           suite: 'api'
           job-suffix: ''
           branch-override: default
-      - '{pipeline}-vitrage-dsvm-{suite}{job-suffix}':
+      - '{pipeline}-vitrage-dsvm-{suite}-{node}{job-suffix}':
           pipeline: gate
-          node: ubuntu-trusty
+          node:
+            - ubuntu-trusty
+            - ubuntu-xenial
           suite: 'datasources'
           job-suffix: ''
           branch-override: default

jenkins/jobs/vitrage.yaml

@@ -1,5 +1,5 @@
 - job-template:
-    name: '{pipeline}-vitrage-dsvm-{suite}{job-suffix}'
+    name: '{pipeline}-vitrage-dsvm-{suite}-{node}{job-suffix}'
     node: '{node}'
 
     wrappers:

zuul/layout.yaml

@@ -1884,8 +1884,8 @@ jobs:
 
   # NOTE(aweyl) tempest test for vitrage was introduced in the mitaka cycle,
   # so testing the earlier branches doesn't make sense.
-  - name: ^gate-vitrage-dsvm-datasources$
-    branch: ^(?!stable/liberty).*$
+  - name: ^gate-vitrage-dsvm-datasources-ubuntu-trusty$
+    branch: ^stable/mitaka$
 
   # NOTE(markvan) (heat) functional lbaas v2 testing was introduced in the mitaka
   # cycle as experimental, so testing it there and earlier branches doesn't make sense.
@@ -17817,11 +17817,15 @@ projects:
       - name: publish-to-pypi
       - name: openstack-server-publish-jobs
     check:
-      - gate-vitrage-dsvm-api
-      - gate-vitrage-dsvm-datasources
+      - gate-vitrage-dsvm-api-ubuntu-trusty
+      - gate-vitrage-dsvm-api-ubuntu-xenial
+      - gate-vitrage-dsvm-datasources-ubuntu-trusty
+      - gate-vitrage-dsvm-datasources-ubuntu-xenial
     gate:
-      - gate-vitrage-dsvm-api
-      - gate-vitrage-dsvm-datasources
+      - gate-vitrage-dsvm-api-ubuntu-trusty
+      - gate-vitrage-dsvm-api-ubuntu-xenial
+      - gate-vitrage-dsvm-datasources-ubuntu-trusty
+      - gate-vitrage-dsvm-datasources-ubuntu-xenial
 
   - name: openstack/vitrage-dashboard
     template: