Stop expanding hostvars in ansible inventory

We do not use the data in the expanded hostvars, so it results in a
bunch of completely unneccessary api calls.

Change-Id: I61bb7610e1dc46a6305a1b3f32f19d2e8ee8394c

modules/openstack_project/templates/puppetmaster/ansible-clouds.yaml.erb

@@ -1,5 +1,6 @@
 ansible:
   fail_on_errors: False
+  expand_hostvars: False
   use_hostnames: True
 cache:
   expiration_time: 86400