* Go thru component NH list, and pick local component NH
  if there is no ecmp peer path or local ecmp mpls label.
* If a link to instance-ip is not present, retain previous
  known mode inline with ip-address.
* If flow transition from non-ecmp to ecmp trap the forward flow
* Test case for same added
Closes-bug: #1364908

Change-Id: If6f78b8cc7b3a62b2bb1cd7b0d30b38aaad545c7
Merge "* Go thru component NH list, and pick local component NH   if there is no ecmp peer path or local ecmp mpls label. * If a link to instance-ip is not present, retain previous   known mode inline with ip-address. * If flow transition from non-ecmp to ecmp trap the forward flow * Test case for same added Closes-bug: #1364908"