Change ignore-errors to ignore_errors
Change ignore-errors to ignore_errors

Needed for coverage 4.0

Change-Id: I38a9361df07f290ea3588996462bbbc1a6d7b8d8

openstack/python-openstackclient,redhat-openstack/python-openstackclient,openstack/python-openstackclient,dtroyer/python-openstackclient,redhat-openstack/python-openstackclient,BjoernT/python-openstackclient,BjoernT/python-openstackclient,dtroyer/python-openstackclient