[jtha] Add ZooKeeper service name optional argument
[jtha] Add ZooKeeper service name optional argument

This change adds an optional parameter that can be used to
specify the ZooKeeper name that can be used for auto-failover.
The ZK service is automatically picked up from dependency
but if none exist (it is an optional dependency), then this
parameter can be used to specify that.

justinhayes/cm_api,cdapio/cm_api,cloudera/cm_api,cdapio/cm_api,cdapio/cm_api,justinhayes/cm_api,cloudera/cm_api,justinhayes/cm_api,cdapio/cm_api,cloudera/cm_api