ciao-controller: Don't allow missing instances to be deleted
ciao-controller: Don't allow missing instances to be deleted

In order to avoid zombie instances running on nodes that disappear and
then reappear to not allow missing instances to be deleted.

Signed-off-by: Rob Bradford <c49e1dc14cd52e2644816db47123896e0ac79025@intel.com>

ciao-project/ciao,01org/ciao,ciao-project/ciao,01org/ciao,kaccardi/ciao,kaccardi/ciao