Updated openstack/openstack
Project: openstack/nova  96b39341d5a6ea91d825d979e2381b9949b26e27

Fix broken cert revocation

Cert revocation was broken by
32b0adb591f80ad2c5c19519b4ffc2b55dbea672.  os.chdir() never returns
anything, so this method would always raise an exception.  The proper
way to handle an error from os.chdir() is to catch OSError.

There were existing tests for this code, but they conveniently mocked
os.chdir() to return values that are never actually returned.  The
tests were fixed to match the real behavior.

Change-Id: I7549bb60a7d43d53d6f81eecea31cbb9720cc8b6
Closes-bug: #1376368