Comment 8 for bug 1643842

Reviewed: https://review.opencontrail.org/31185
Committed: http://github.com/Juniper/contrail-controller/commit/7486c3debb8837de4625a0d4902e743108e1d4d2
Submitter: Zuul (<email address hidden>)
Branch: R3.2

commit 7486c3debb8837de4625a0d4902e743108e1d4d2
Author: Manish <email address hidden>
Date: Fri May 5 19:32:52 2017 +0530

ECMP load balance is not effective on remote SI compute.

Problem:
On SI compute routes are imported from CN with ECMP NH.
These routes were not notifying change in load balance params if changed.

Solution:
Notify on change in ecmp hash fields.

Note:
Any change in hash fields gets applied to new flows. Existing flows continue to
use same index as computed before.

Closes-bug: #1643842

Conflicts:
 src/vnsw/agent/controller/controller_route_path.cc
Change-Id: I0216e12ba90b152c58deaaf67b477876eddfc9e8