tree 0f64af4da352653c22badcce0ff7cd78be07daa7
parent a450bd000b112718d8a0a891404ad756ad43f678
author Ray Milkey <ray@onlab.us> 1459792607 -0700
committer Gerrit Code Review <gerrit@onlab.us> 1459805853 +0000

STC fixes

- NPE when a switch has already been removed and an attempt is made
  to access stats on the switch.

- NPE in group provider if the system is in the process of shutting down.

- Lower ERROR to WARN when switch resources are not available.

Change-Id: I5b90ff328b19c2d661fde3a24e90614999c4c900