Comment 6 for bug 1457337

Reviewed: https://review.opencontrail.org/11177
Committed: http://github.org/Juniper/contrail-controller/commit/27cd7947c71e6fd5b0dccac3c77feab931062172
Submitter: Zuul
Branch: R2.20

commit 27cd7947c71e6fd5b0dccac3c77feab931062172
Author: Naveen N <email address hidden>
Date: Tue Jun 2 14:43:01 2015 +0530

* Copy ARP mac, interface and resolved flag in Sync() API of route

Routes and nexthops dependent on ARP route are updated, when
any variable in ARP nexthop are changed. When ARP timer is
expired, nexthop gets marked as invalid and route Sync is triggered,
in this sync() API arp_mac and valid flags were not updated, hence
eventually when ARP resolution succeds, there would be no change in
agent path and the dependent nexthop would not be resolved.
Test case for same
Closes-bug:#1457337

Change-Id: I5c5c168367ce706a347a93f9f4852f8c5b68e95b