Defaults to opening a connection to ZooKeeper then closing right after the data_sources are cached
Small fix to ds check
Revert to old opts default setup
Merge branch 'hotfix_zk_connection_management'

* hotfix_zk_connection_management:
  Revert to old opts default setup
  Small fix to ds check
  Defaults to opening a connection to ZooKeeper then closing right after the data_sources are cached