unit test for issue #3047
fix for issue #3047
fix for issue #3047
Merge branch 'fix/3.x/issue-3047' of https://github.com/serkan-ozal/hazelcast into fix/3.x/issue-3047

Conflicts:
	hazelcast/src/main/java/com/hazelcast/util/SortingUtil.java
fix for issue #3047
Performance optimisation in WebFilter: use IMap.set instead of IMap.put
Allow WebFilter subclasses to override HazelcastHttpSession creation

Split of creation of new HazelcastHttpSession instances to a protected method
to allow subclasses to return a customized version of HazelcastHttpSession.
ReplicatedStressTest removed as it was breaking nightly build due too many threads being spwawn.
The test will be rewritten as a stabilizer test.
Merge pull request #3372 from jerrinot/fix/replicatedMap-nightly-fix/master

ReplicatedStressTest removed as it was breaking nightly build due too ma...
removed problematic marker
accepts zero as ttl parameter
Fixed findbugs deadstore issue.
Merge pull request #2510 from noctarius/issue2509

Clean reimplementation to fix issue #2509
fix for issue #3047 on master branch
unit test for issue #3047 on master branch
Resources section updated by adding Code Samples

link.
Partition Group configuration section mostly compl

eted.
updated paging predicate javadoc related to anchor,fixes #3241
Fixed multimap migration.rollback
Fixed multimap migration.rollback