tree b905f70734c18d0672e8dd87480908464eb1dd9a
parent 6d1cb159fd06efc94de8d88149669ecacc26ad5b
author Charles Chan <rascov@gmail.com> 1539286536 -0700
committer Charles Chan <charles@opennetworking.org> 1549505059 +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
(cherry picked from commit 5145de234844ce01911bc81704de8454ee9f42c8)