ISPN-3911 HotRod authentication server integration fixes
- cleanly separate the secure and unsecure paths
- use an ANONYMOUS Subject in the secure path until a user has been authenticated
ISPN-4279 Update dependencies to Apache Lucene 4.8.0
ISPN-4279 Resolve a couple of deprecations in tests
ISPN-4279 Make Lucene Directory compatible with Lucene 4.8: implement checksum capabilities in IndexOutput implementations
ISPN-4279 Update documentation to mention Lucene 4.8 compatibility