OSA jobs highly unstable, make them non-voting in ARA gate

It is maybe a coincidence but ever since OSIC has been taken out
of nodepool, OSA jobs have become highly unstable in the ARA gate.
I'll venture and say they had a 50% chance of failing in both check
and gate, making it very hard (and wasteful) to land even the most
trivial of patches [1].

The CentOS jobs seems especially likely to timeout often or fail
on a pyopenssl error.
Let's make both OSA jobs non-voting for now so we're not needlessly
wasting resources doing re-checks all the time until this issue
gets looked at.

[1]: https://review.openstack.org/#/c/491029/

Change-Id: I7fdd65256b81e0d194d5cd9650dde5e43682e48c

jenkins/jobs/ara.yaml

@@ -53,7 +53,7 @@
 # gate ($ZUUL_PROJECT == 'openstack/ara'), it retrieves ARA from zuul-cloner,
 # otherwise, PyPi.
 - job-template:
-    name: 'gate-ara-integration-openstack-ansible-func-{ostype}'
+    name: 'gate-ara-integration-openstack-ansible-func-{ostype}{suffix}'
     node: '{ostype}'
     wrappers:
       - build-timeout:

jenkins/jobs/projects.yaml

@@ -294,10 +294,11 @@
           ansible_version: devel
           ostype: ubuntu-xenial
           suffix: '-nv'
-      - 'gate-ara-integration-openstack-ansible-func-{ostype}':
+      - 'gate-ara-integration-openstack-ansible-func-{ostype}{suffix}':
           ostype:
             - centos-7
             - ubuntu-xenial
+          suffix: '-nv'
 
 - project:
     name: arch-wg

zuul/layout.yaml

@@ -5612,16 +5612,14 @@ projects:
       - gate-ara-integration-py35-devel-ubuntu-xenial-nv
       - gate-ara-integration-py35-latest-fedora-25
       - gate-ara-integration-py35-devel-fedora-25-nv
-      - gate-ara-integration-openstack-ansible-func-centos-7
+      - gate-ara-integration-openstack-ansible-func-centos-7-nv
-      - gate-ara-integration-openstack-ansible-func-ubuntu-xenial
+      - gate-ara-integration-openstack-ansible-func-ubuntu-xenial-nv
       - ara-coverage-ubuntu-xenial
     gate:
       - gate-ara-integration-py27-2.2.3.0-centos-7
       - gate-ara-integration-py27-latest-centos-7
       - gate-ara-integration-py35-latest-ubuntu-xenial
       - gate-ara-integration-py35-latest-fedora-25
-      - gate-ara-integration-openstack-ansible-func-centos-7
-      - gate-ara-integration-openstack-ansible-func-ubuntu-xenial
     pre-release:
       - ara-tarball:
           - ara-tarball-signing