Change openstack version to pike for master

In master branch we always have to deploy latest release
we are working on.

Change-Id: I39b4b3c25663991fa86e19394afd8d28878d3446
diff --git a/classes/cluster/virtual-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index 5a2e747..1279f66 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -38,7 +38,7 @@
 - system.designate.server.backend.bind
 parameters:
   _param:
-    openstack_version: ocata
+    openstack_version: pike
     cluster_public_host: ${_param:single_address}
     cluster_public_protocol: http
     openstack_region: RegionOne