Current stx-tools infrastructure allows the download of tar compressed files
having different names, directory output and version including commits, see a
more detailed description here:
https://review.openstack.org/#/c/577953/
All our compressed tar files are in gz format and this change makes our life easier
avoiding us to add the check of bz2 format.
Change-Id: Ic909dc7fc813956caf3f5cf4a6873b018967f42b
Signed-off-by: Abraham Arce <abraham.arce.moreno@intel.com>
921fc22a82