ISPN-4724 IntervalTree does not compile with java 8
ISPN-4706 Don't abort Marshalling on interruption
ISPN-4725 Bump minimum maven requirement to 3.0.5 to resolve compilation issues with the uber modules
ISPN-2538 Endless loop in TreeMap.remove at shutdown of query-enabled
cache

* Changed map to be synchronized
ISPN-3743

Ignore some of the errors that can be thrown by a node while stopping:
IllegalStateException and NullPointerException.