Wait for router interface removal before remove router

Related-Prod: PRODX-27590
Change-Id: I0d3df8beda5caf17dd08fecdce7807cc49d6c9d6
(cherry picked from commit d9acbb516b881421ad6217e5a65e3a09d64a8be5)
(cherry picked from commit 80eddc292c054a6793e02ed97011ca98fde904c7)
4 files changed