Move few openstack _params to defaults

   * galera|rabbitmq ssl
   * openstack port|ssl

Change-Id: Ibd3b8d4760b9b062c5d7eb7c58049b83c9732973
diff --git a/defaults/rabbitmq/init.yml b/defaults/rabbitmq/init.yml
new file mode 100644
index 0000000..2cad9ec
--- /dev/null
+++ b/defaults/rabbitmq/init.yml
@@ -0,0 +1,4 @@
+parameters:
+  _param:
+    # SSL
+    rabbitmq_ssl_enabled: False