tree 4cd317888c0f959819ecbda5dcb1e310b0bda458
parent f241549c96d8d9eab739c2f7ce170174a9182f56
author Charles Chan <rascov@gmail.com> 1480833636 -0800
committer Yuta HIGUCHI <y-higuchi@onlab.us> 1480991137 +0000

Fix NPE when clean up SingleSwitchFibInstaller

interfaces can be null if no interface config is provided

Change-Id: I67f94f78ef1fb4536e5bbc940be6216e2699f2fe
(cherry picked from commit 14ed0b65f3d2316f5ec7c4a8ed56b88f1fe02d33)