Aggregate command cleanup is not required for the virtual router as we
already cleanup in the finish.

And consequently dies if somebody tries to test with assertions enabled.
Switch the catch to Throwable. Uncaught exceptions in a scheduled
threadpool executor will not report or log uncaught exceptions but will
kill the thread causing unexplained timeouts in CS.
rvr4vpc simple test for deployRouter
checkstyle: unused imports
Prevent a NPE when shutting down a network that did not have a vlan
assigned yet.
oversimplified test fixed