Run nova functional tests on upper-constraints.txt changes

In order to reduce the risk of potential fall-out with upper-constraints
changes in global-requirements we'd like to start running functional
tests in projects. Start with Nova as a guinea pig.

Change-Id: Idd1b4e5d17d09684d2ae0e56e1d94ac1175eebe1

jenkins/jobs/python-jobs.yaml

@@ -156,6 +156,33 @@
 
     node: '{node}'
 
+- job-template:
+    name: 'gate-cross-{name}-func-{node}'
+    description: 'Same job as gate-{name}-tox-functional but clones {name}'
+
+    wrappers:
+      - build-timeout:
+          timeout: 50
+      - timestamps
+
+    builders:
+      - print-template-name:
+          template-name: "{template-name}"
+      - zuul-git-prep-upper-constraints-cross:
+          project: openstack/{name}
+      - install-distro-packages
+      - extra-test-setup
+      - revoke-sudo
+      - run-tox:
+          envlist: 'functional'
+      - assert-no-extra-files
+
+    publishers:
+      - test-results
+      - console-log
+
+    node: '{node}'
+
 - job-template:
     name: 'periodic-{name}-{python}-with-oslo-master'
     node: ubuntu-xenial
@@ -536,6 +563,7 @@
     node: ubuntu-xenial
     jobs:
       - 'gate-cross-{name}-python27-{node}'
+      - 'gate-cross-{name}-func-{node}'
 
 
 - job-group:

zuul/layout.yaml

@@ -2007,6 +2007,12 @@ jobs:
   - name: ^gate-cross-.*-python.*$
     files: ^upper-constraints.txt$
 
+  # Only run the cross functional tests on upper-constraints.txt updates
+  - name: ^gate-cross-.*-func-.*$
+    files: ^upper-constraints.txt$
+    # NOTE(dmllr) make voting once it passes
+    voting: false
+
   - name: ^gate-puppet-openstackci-puppet-beaker-rspec-.*$
     voting: false
 
@@ -16931,6 +16937,7 @@ projects:
       - gate-cross-keystone-python27-ubuntu-xenial
       - gate-cross-neutron-python27-ubuntu-xenial
       - gate-cross-nova-python27-ubuntu-xenial
+      - gate-cross-nova-func-ubuntu-xenial
       - gate-cross-swift-python27-ubuntu-xenial
     gate:
       - gate-requirements-pep8-ubuntu-trusty