Backwards compatibility with setuptools 0.9.8
Setuptools 0.9.8 does not support PEP 440 version schema with +git
suffix and PEP 508 env markers.
https://fedorahosted.org/freeipa/ticket/6468
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Pavel Vomacka <pvomacka@redhat.com>