Updated openstack/openstack
Project: openstack/sahara  1442ac752a86c689916c13744159408ed8ea6108

Fixed DecommissionError bug

DecommissionError now can be raised without arguments
(with default message).

Change-Id: I4f8817b3cd6e58384438cb1a6444efbff0f1047b
Closes-bug: #1355084