1.[ISSUE #1422](https://github.com/sharding-sphere/sharding-sphere/issues/1422) Exception occur when using defaultDataSourceName and defaultDatabaseStrategy at same time
1.[ISSUE #1412](https://github.com/sharding-sphere/sharding-sphere/issues/1412) Support broadcast table
2.[ISSUE #1422](https://github.com/sharding-sphere/sharding-sphere/issues/1422) Exception occur when using defaultDataSourceName and defaultDatabaseStrategy at same time