[issue16799] switch regrtest from getopt options to argparse Namespace

[Tshepang Lekhonkhobe]

Changes by Tshepang Lekhonkhobe <tshepang at gmail.com>:


----------
nosy: +tshepang

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16799>
_______________________________________