(HTCONDOR-387)  Add instructional comment.  Allow THE_URL to be set in the environment.  Write the tarball's version to the log.  Autoremove test containers.
(HTCONDOR-387)  Add instructional comment.  Allow THE_URL to be set in the environment.  Write the tarball's version to the log.  Autoremove test containers.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor