Comment 13 for bug 1445692

Reviewed: https://review.opencontrail.org/9532
Committed: http://github.org/Juniper/contrail-web-controller/commit/901f95c406d70ce9d15071384f9b62e15005904c
Submitter: Zuul
Branch: R2.0

commit 901f95c406d70ce9d15071384f9b62e15005904c
Author: balamurugang <email address hidden>
Date: Mon Apr 27 10:36:49 2015 +0530

n case external gateway for l3 router remains same, but conected VN's are added
or deleted then we need to manually update the route table ref to
"rt_uuid_of_logical_router" in each VN.

In case when external gateway is updated or deleted, then neutron external
gateway update
takes care of adding and deleting route table refs for the VN's.

Added error check in the logical router api part..

Change-Id: Ia944999c17935863e3023804d363d53a82db80dc
Closes-Bug: #1445692