* Upon transition from ECMP nexthop to non ecmp nexthop,
  reset composite NH key maintained in path.
  When transition happens to unicast nexthop, and a resync of the
  route happens agent used to use composite NH key and make the route
  point to wrong nexthop. Correcting the same.
  Fix for bug 1348474

Change-Id: I6acc6289d46ac5233104f141b1c0d025c2a9e7c4
Merge "* Upon transition from ECMP nexthop to non ecmp nexthop,   reset composite NH key maintained in path.   When transition happens to unicast nexthop, and a resync of the   route happens agent used to use composite NH key and make the route   point to wrong nexthop. Correcting the same.   Fix for bug 1348474"