ZeldaBreath

I've added the h2 driver dependency for the shardingsphere-jdbc-example module, then it will be fixed.

> @ZeldaBreath Modules should not strongly depend on the H2 database, you should see why they depend on H2 OK, Thanks! I will try to fix it in other way.

I noticed that the memory mode has been removed, now default mode is Standalone, but Standalone mode uses h2 driver (configured in JDBCRepositoryPropertyKey) and JDBCRepository by default. And then, some...