Comment 6 for bug 1777610

Reviewed: https://review.opencontrail.org/43952
Committed: http://github.com/Juniper/contrail-vcenter-manager/commit/6c71fb52e9ac96a8254bc21c6cd87ccf6ba275b2
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit 6c71fb52e9ac96a8254bc21c6cd87ccf6ba275b2
Author: Adrian Szczepański <email address hidden>
Date: Tue Jun 19 11:57:41 2018 +0200

Delete back-ref objects while deleting from VNC

Delete VM and VMI back ref objects while deleting
Remove deleting Instance IP on VMI delete in VMI Service

Closes-Bug: #1777610
Change-Id: I62c2e21f03afe1362babc0c0e3bd02cea0f12e1b