commit debcf881ec3f23319cd7e3229c6afea88ccd1690
author Saurav Das <sauravdas@alumni.stanford.edu> Fri Apr 06 20:16:01 2018 -0700
committer Charles Chan <rascov@gmail.com> Sat Apr 07 12:58:59 2018 -0700
tree 00cbd7db3692c272cf49834fa6c52703148a1b15
parent 5200392622ae09c0fd825ed5e8f9c3c86b519117

Fixes for CORD-2910, 2920, 2915

 - When dealing with possible fake links which tend to be unidirectional, do not
   update internal stores until bidirectionality is verified
 - When figuring out ECMPspg, do not use LinkService to figure out bidi egress
   links. Instead use linkHandlers seen-links
 - Prevent NPE in updatedEcmpSpg
 - Improve logic for bringing up downed dual-home host ports: any active uplink,
   not just the first one should re-enable ports

Change-Id: I4412578e72a6d441cacfa2e023870ceb7c7eab04