rhos-release descriptive error message
rhos-release descriptive error message

Added detailed error message when puddle is missing
and cannot be determined from the stdout.

Change-Id: Id1d3723b2fecfe2184e1f14d60734e5be5a5de9b

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