Traffic distribution in ECMP, when some instances go down
Traffic distribution in ECMP, when some instances go down

When a service instance goes down, new flows that would've gone to
that instance are sent to the next instance in the NH list, resulting
in not having proper distribution.

Updating to hash among the available components.

Change-Id: Ife4a671c7fe7d80e87b4e4f912c6f0e0d2fcc7ab
closes-bug: #1702610

rombie/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller