Make step an integer on the pacemaker controller

This resolves the issue causing the 'step' hiera setting
to get written as a string (thus causing puppet failures)
on a pacemaker controller.

Change-Id: I70037889e499846460357928f8637a35ac97bc7a
Closes-bug: #1631488

puppet/controller-config-pacemaker.yaml

@@ -26,6 +26,9 @@ resources:
         modulepath: /etc/puppet/modules:/opt/stack/puppet-modules:/usr/share/openstack-puppet/modules
       outputs:
       - name: result
+      inputs:
+      - name: step
+        type: Number
       config:
         list_join:
         - ''