[refactor] Split 15 min mysql startup between two wait states

salt/mysql/init.sls

@@ -94,12 +94,12 @@ so-mysql:
       - /opt/so/conf/mysql/etc
   cmd.run:
     - name: until nc -z {{ MAINIP }} 3306; do sleep 1; done
-    - timeout: 900
+    - timeout: 600
     - onchanges:
       - docker_container: so-mysql
   module.run:
     - so.mysql_conn:
-      - retry: 900
+      - retry: 300
     - onchanges:
       - cmd: so-mysql
 {% endif %}