Fixes: schema crash with RT delete
Fixes: schema crash with RT delete

When a RT is deleted, we call a RT delete
on the object again. Providing a new helper
function so that the RT can be deleted without
calling the delete method.

Closes-Bug 1635048

Change-Id: I506db27382b7d64d9451a619956f6e9edc785385

nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller