Ensure the role works when run in serial

The role tests execute in parallel however the integrated repo executes
in serial. This change simply makes sure that this role always functions
no matter the execution method.

Change-Id: I3938eb54996a8ea5183cf4109b992451345b0585
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

handlers/main.yml

@@ -81,6 +81,7 @@
   delegate_to: "{{ item }}"
   when:
     - hostvars[item]['galera_cluster_ready'] is defined
+    - hostvars[item]['galera_deployed'] | default(false) | bool
   with_items:
     - "{{ ansible_play_hosts }}"
   run_once: true

tasks/galera_install.yml

@@ -91,3 +91,7 @@
     section: galera
     option: deployed
     value: true
+
+- name: Set the galera existing cluster fact
+  set_fact:
+    galera_deployed: true