tree 62b1a79531a3eb49beabe7de7ae199c4ca91eaab
parent 55181d2cfba5dd6bbbde42bb964782e8c2b8ee50
author Nachi Ueno <nachi@ntti3.com> 1376356736 -0700
committer Nachi Ueno <nachi@ntti3.com> 1376438927 -0700

Added functions for get a ip on an instance

The cause of some gating failure looks like
because of getting ip address on instance.
However current exercise didn't log the return value.
In this commit, we add get_instance_ip function with
error hanlding support, and apply it on the execise.

Change-Id: I8e17ba68093faafe58a98eb780a032368eea38aa