Switch upgrade test to non-voting

The upgrade test is currently failing due to the test
implementation, rather than a failure to upgrade. The
issue is that UCA for queens is implemented and packages
are installed from there, before the pike UCA replaces
it and installs other packages. The mixed set is not
compatible with the version of libvirt-python that needs
to be built.

Until we can fix the job, let's allow other patches to
merge.

Change-Id: I349c39be84a360b4560fb6683d0e209cd18e85e7

zuul.d/project.yaml

@@ -19,7 +19,10 @@
         - openstack-ansible-functional-centos-7
         - openstack-ansible-functional-opensuse-423
         - openstack-ansible-functional-ubuntu-xenial
-        - openstack-ansible-upgrade-ubuntu-xenial
+        # TODO(odyssey4me):
+        # Restore this to voting once the test is
+        # working again.
+        - openstack-ansible-upgrade-ubuntu-xenial-nv
         - openstack-ansible-lxd-ubuntu-xenial
         - openstack-ansible-nova-ssl-nv
     experimental:
@@ -31,6 +34,9 @@
         - openstack-ansible-functional-centos-7
         - openstack-ansible-functional-opensuse-423
         - openstack-ansible-functional-ubuntu-xenial
-        - openstack-ansible-upgrade-ubuntu-xenial
+        # TODO(odyssey4me):
+        # Restore this to voting once the test is
+        # working again.
+        #- openstack-ansible-upgrade-ubuntu-xenial
         - openstack-ansible-lxd-ubuntu-xenial
         - openstack-ansible-nova-ssl-nv