Comment 6 for bug 1577517

Reviewed: https://review.opencontrail.org/20191
Committed: http://github.org/Juniper/contrail-controller/commit/17dc2e2d3321a35a79f6a380f3e6d5d07f4b94cb
Submitter: Zuul
Branch: R2.22.x

commit 17dc2e2d3321a35a79f6a380f3e6d5d07f4b94cb
Author: Manish <email address hidden>
Date: Fri May 13 13:47:27 2016 +0530

Vrf pending because of mpls label.

Problem:
MPLS label was pending pointing to Composite NH. This NH holds
reference to VRF. This label was programmed because adding EVPN path in multicast
route vxlan tag was added as ethernet identifier and label as well. When all
routes except evpn peer path is gone this vxlan tag (which was copied in label)
gets copied to master path which in turn tries to rebake NH for
this label.
EVPN mpls label should only be picked from local path or local vm peer path.

Solution:
Pass invalid label for evpn path.

Change-Id: Iea899d752be101d7a48ebe0e41635ffe23e06602
Closes-bug: #1577517