Updated openstack/openstack
Project: openstack/nova  2f73f387b1764597559d52367d3692e9b3ab87b3

Fix a wrong comment in the code

The docstring in the ExtensionManager class indicates a test file as
guide file, but the path reported is wrong.

Change-Id: I1b95d591cee6da3cc760c365c88ae1809973b98c