Fix possible NPE when 't3-troubleshoot-pingall' command on a host without IP addr

Change-Id: Ibd935d78248e57de55604d3aea1123e08abb9924
(cherry picked from commit 980eea4a63639bf082570c8bf9e882554921112a)
1 file changed
tree: 18e3113c79678154adb2d1a035000153946a1833
  1. BUILD
  2. app/
  3. web/