ISPN-4225 Upgrade to JGroups 3.5.0.Beta5
ISPN-4190 Use Message.Flag.DONT_LOOPBACK instead of RequestOptions.setExclusionList

DONT_LOOPBACK is now a transient flag
ISPN-3645 StateTransferLargeObjectTest hangs randomly

Add a more focused and reliable test: RemoteGetStressTest.