tree 96af76c912c24adc34c23ac540c41d3b5bf4497a
parent f438bb68840b66dcee4aa4b0cc9c0056b4a544a8
author Charles Chan <rascov@gmail.com> 1539286536 -0700
committer Charles Chan <charles@opennetworking.org> 1549411339 +0000

Eliminate redundant flow programming when host moves

When a host moves from [1A/1, 1B/1] to [1A/2, 1B/1], there is no need to program the pair link flow first.
Also update unit tests to verify this behavior.

Change-Id: I97c7ee5f0db891226c7ed477f5f05af5d6c1faa8