ISPN-4410 Remove superfluous elements/attributes from server configurations
ISPN-4411 Use server management port 9990 instead of 9999
ISPN-4389 Tests for suppressing state transfer with jmx fail

* Changed so cluster registry cache never has ST disabled
Updated readme file, failsafe plugin single test info
ISPN-4402 Add test for custom audit logger
ISPN-4408 Distribution ZIP file building fails
ISPN-4384 CacheNotifierImplInitialTransferDistTest test instability

* Dist initial transfer could fail erroneously if remote/local batch
* completed at about the same time
ISPN-4409 Upgrade to LevelDB 0.7 and fix server test assertions

* Upgrade to LevelDB 0.7 in order to align with server's Guava
version which currently is 16.x.
* Fixed LevelDB server test assertions to avoid having to instantiate
the cache's marshaller client side.
ISPN-4012 Mark mass indexing tests as unstable
ISPN-4400 Takes a long time to start up all clusters which has a lot of segments

This is mainly caused by the myriad of internal copies performed by the CopyOnWriteArraySet used in InboundTransferTask for tracking the segments being requested during ST. This collection is updated way too frequently if we have a large number of segments. It seems that using a simple HashMap and doing external synchronization works better both in terms of time and memory.