ISPN-5032 Remove excessive logging from GetKeyValueCommand
BaseDistSyncL1Test doesn't need AFTER_METHOD test cleanup
ISPN-5032 Create a GetCacheEntryCommand to remove the "fetchEntry" modification flag from GetKeyValueCommand
ISPN-5038 Remote package refactor
ISPN-5072 MapExternalizer no longer needs to extend
InstanceReusingAdvancedExternalizer

* Changed which class extends Reusing Externalizer
Implement purgeOnJoin

The joiner will still do the preload, but the entries will be removed from
the data container.

Also includes a fix for ISPN-3217 (entries not written to the cache store
on a backup owner with CACHE_MODE_LOCAL).

A hack was needed to avoid triggering ISPN-3443 (state transfer undoing the
remove operations).