Change hardcoded db dep to variable

I have to remove mysql port configuration, since we dont support
it(yet) using the "universal" way.

Change-Id: I39a873aaf1f4a1389b1e17b189a66591c94464ec

service/ironic-api.yaml

@@ -15,11 +15,11 @@ service:
       pre:
         - name: ironic-db-create
           type: single
-          command: mysql -v -u root -p{{ db.root_password }} -h {{ address('mariadb') }} -P {{ mariadb.port.cont }} -e
+          command: mysql -v -u root -p{{ db.root_password }} -h {{ address(service.database) }} -e
                    'create database `{{ ironic.db.name }}`; grant all privileges on `{{ ironic.db.name }}`.* to
                    "{{ ironic.db.username }}"@"%" identified by "{{ ironic.db.password }}"'
           dependencies:
-            - mariadb
+            - {{ service.database }}
         - name: ironic-db-sync
           type: single
           command: ironic-dbsync