ISPN-2995 FineGrainedAtomicHashMap may not lock all the composite keys in optimistic locking
ISPN-3089 The first write to a joiner in invalidation mode can be ignored

Make the awaitInitialTransfer setting default in invalidation mode as well.
Use AssertJUnit instead of assert keyword in XmlFileParsingTest
Update BDBJE to latest version
Clean up commit a751fb4a18092533a27e3ca81171730e1370e5ad
ISPN-3163 Version generation should be common for all use cases

* By doing this, compatibility mode updates will result in change of
version which helps keep the premise that when data changes, version
changes too. This is needed for Hot Rod and Memcached endpoints.
* Version generator is therefor now a component that can be used by
server endpoints to generate version information.
* ClusterIdGenerator dissapears as a result of this and instead a
VersionGenerator class has been created that does the same job.
ISPN-3205 Upgrade to JGroups 3.3.1.Final