tree b4c79158be4bb7f54a4bd7d30ab0c3c563e2f7ec
parent 9b03d11d8c8fc884419b3a2aa813f647f724a87e
author Charles Chan <rascov@gmail.com> 1539286536 -0700
committer Charles Chan <charles@opennetworking.org> 1549505074 +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)