Quote the regex for os-testr
Quote the regex for os-testr

The regexp needs to be at least quoted before
passing it to the os-testr.

Change-Id: I4eeafa8138c4ba9fcc632e946c4d11547c94fdf8

okolisny/InfraRed,redhat-openstack/infrared,okolisny/InfraRed,redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed