Update the upgrade.yml for mariadb roles

beacause upgrade is not required to recreate the database
TrivialFix

Change-Id: I50bbb1592dd1fd5262642077bbe3d9bd32503033

ansible/roles/mariadb/tasks/do_upgrade.yml

----
-- include: start.yml
-
-- include: register.yml

ansible/roles/mariadb/tasks/upgrade.yml

@@ -3,6 +3,6 @@
 
 - include: lookup_cluster.yml
 
-- include: do_upgrade.yml
+- include: start.yml
 
 - include: check.yml