TT#35502 Check mariadb.service as well as alias mysql.service

We have migrated to mariadb.service in mr6.2/systemd
while lest check both for some time for the backward compatibility.

Change-Id: Icea3acd0614ca0fd389c21a9e72687125fa2fefe
(cherry picked from commit 47f5eab28b)

templates/500_init-daemons-dabian.yaml.tt2

@@ -32,6 +32,10 @@ service:
     enabled: [% general.init_system == 'systemd' ? 'false' : 'true' %]
     running: [% general.init_system == 'systemd' ? 'false' : 'true' %]
 
+  mariadb.service:
+    enabled: true
+    running: true
+
   mysql.service:
     enabled: true
     running: true