Local facts are strings so make this explicit

This patch fixes the following ansible warning:

[WARNING]: The value True (type bool) in a string field was converted to
u'True' (type string). If this does not look like what you expect, quote the
entire value to ensure it does not change.

Change-Id: Ic5b2d0c8d9f30284587a61385c2d78517a82f6e8

tasks/main.yml

@@ -45,7 +45,7 @@
     dest: "/etc/ansible/facts.d/openstack_ansible.fact"
     section: "galera"
     option: initialized
-    value: true
+    value: "True"
 
 - name: Refresh local facts
   setup: