Make it easier to import modules in Eclipse
ISPN-2509 Force transport instance creation if pingOnStartup enabled
Remove unused ResponseGenerator dependency

This used to be injected in CacheImpl to make sure the ResponseGenerator is properly constructed if needed but this is no longer required since ComponentRegistry already does that.
ISPN-2749 Use StateTransferManager.isStateTransferInProgressForKey(key) whenever possible instead of ad-hoc implementations