Sorting a HashSet only to put it back into a HashSet

Right now in the method that sorts a Set of TableIds on line 236 in RelationalSnapshotchangeEventSource.java, if there is no whitelist supplied the method returns a set of sorted TableIds but in a HashSet Collection (line 247). When it gets added back to a HashSet, ordering is lost and the sort operation was essentially useless. Instead, changing it to a LinkedHashSet should preserve order (it is a LinkedHashSet for when whitelist is supplied).