Fix state of router when we notice it is missing
Fix state of router when we notice it is missing

We used to rely on receiving an event to know that a router had been
deleted. We're going to be filtering that event out (see subsequent
changesets), so we need to properly detect that a router VM is gone and
mark ourselves as down so the automaton can reboot us.

Change-Id: I287a8dcc208bc709687cf63a0f17ace25265d178

dreamhost/akanda-rug,openstack/akanda-rug,openstack/akanda-rug,stackforge/akanda-rug,markmcclain/astara,stackforge/akanda-rug