Pin /opt/ansible as source of openstack inventory

We clone ansible to /opt/ansible and use it as the source of our
openstack inventory script. Newer ansible has renamed this script so we
need to migrate to the new thing. Until we are ready to do that pin to
an older version of ansible that has the script at the old location.

Change-Id: I2084601b8f2f3629205b3c2c415bc1ad793226b0

modules/openstack_project/manifests/puppetmaster.pp

@@ -262,7 +262,10 @@ class openstack_project::puppetmaster (
   vcsrepo { '/opt/ansible':
     ensure   => latest,
     provider => git,
-    revision => 'devel',
+    # Pinned here because the shade + openstacksdk merger resulted in the
+    # openstack.py inventory script below getting renamed and may require new
+    # deps.
+    revision => 'v2.5.3',
     source   => 'https://github.com/ansible/ansible',
   }