FIX: Adding check for test.openstack.version
FIX: Adding check for test.openstack.version

Run version-discovery only when test.openstack.version
is not defined.

Change-Id: I964f76cbb880ae425a0a4dea775ab1b505ed8e9e

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared