Revert "Avoid facts gathered twice when deploying with --limit"

This reverts commit d366dd7e4a0002a2e170dbbda1107f61807323e5 as it
breaks deploying with --tags

Change-Id: If0d510698d432b536617fcb10b775a1519c6dd8a

ansible/site.yml

@@ -10,9 +10,8 @@
   gather_facts: false
   tasks:
     - setup:
-      when:
-        - (play_hosts | length) == (groups['all'] | length)
-  
+  tags: always
+
 # NOTE(pbourke): This case covers deploying subsets of hosts using --limit. The
 # limit arg will cause the first play to gather facts only about that node,
 # meaning facts such as IP addresses for rabbitmq nodes etc. will be undefined