Automatic log cleanup by the Cluster Coordinator

In this release, the Cluster Coordinator has been updated to automatically clean up its logs.

The cleanup is enabled by default. For the logs cleanup, Endeca Server uses two new parameters in EndecaServer.properties to control how many snapshots of logs ZooKeeper should keep in the data directory, and how often ZooKeeper should run an automatic log cleanup:

The endeca-cluster-coordinator-auto-purge-snap-retain-count sets the number of snapshot logs to retain in the ZooKeeper data directory, and is set to 3 by default.
The endeca-cluster-coordinator-auto-purge-interval sets the logs cleaning task interval in hours, and is set to 1 by default. To disable the automatic logs cleanup for ZooKeeper, set it to 0 (zero).