FlowComparator should compare concurrent tasks on VersionedPort

Now that we have VersionedPorts that support remote access, the user in NiFI can configure the concurrent tasks value on these public ports, and it is saved to registry and then used when importing again. The issue is that a change to the concurrent tasks value of a public port does not trigger a local change on NiFi side in the same way it does for a processor. This is because the flow comparator in registry doesn't compare it.