Previously the Hazelcast support only worked with
embedded Hazelcast instances.
This commit ensures that Hazelcast support works
with external Hazelcast instances.
Fixes gh-339
* This commit moves the hazelcast support into a parent package
so that it no longer impies a Spring Data dependency.
* Add guards on SessionEntryListener logger
* Remove getSessionMapName on HazelcastHttpSessionConfiguration
* Use setSessionMapName on HazelcastHttpSessionConfiguration
rather than field access
* Formatting polish
* Fix Javadoc
Issue gh-276
