mariadb: Set container port in pod to 3306

container port for pod should be set

Change-Id: I04144487f8803b1f83d59bdc978c4f6dfa431d0d

docker/mariadb/mariadb.json

@@ -10,7 +10,10 @@
         "env": [{
 	  'name': 'DB_ROOT_PASSWORD',
 	  'value': 'password'
-	}]
+	}],
+        "ports": [{
+          "containerPort": 3306
+        }]
       }]
     }
   },