ISPN-4327 Update to Apache Lucene 4.8.1
ISPN-4325 Change CloseableIterable to use AutoCloseable instead of
Closeable

* Changed CloseableIterable to use AutoCloseable
* Changed CloseableIterator to use AutoCloseable
ISPN-4299 Allow a null callback handler when a client subject
has been supplied
ISPN-4224 Kerberos auth IT fails on JDK8
ISPN-4177 Upgrade to WildFly 8.1.0.CR2
Fix server test suite after rebase to WildFly