The source pattern for the tarballs.openstack.org openstackid
redirect incorrectly included an openstack parent directory. Remove
it, an also make the regex more properly differentiate lack of a
trailing "/" character from a directory name containing openstackid
as a substring (not that there is one, but this serves as a safer
template for future additions).
Change-Id: I705d849d1c10cf91391181aeef72a9f4b495d520
5390bbf23f