Release 0.5.0

This tempest-lib release includes:
 * Support for specifying a prefix on the rand_name() function
 * Migration of the ssh module from tempest
 * A few cleanups and missing pieces for the auth.py module
 * subunit-trace bug fix
 * Improved unit tests and docstring coverage

This also marks the last release which will include subunit-trace as
part of tempest-lib. This will be moved to the os-testr project in
future releases. (and os-testr will be added as a requirement)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=dqam
-----END PGP SIGNATURE-----