j-griffith f93bc791bf Switch from ostestr to stestr
This change just updates the tox.ini file to call stestr directly
instead of going through ostestr.

For more background you can read the ML posting:
    https://goo.gl/TFvcxy

So now you won't need `--n` to run single tests, and you can also
supply regex directly without even the `--`.  For example:
  `tox -epy27 $regex`

Change-Id: I75d4ca19f87fe1930cf54b554b7e232632a4a21c
2017-10-15 15:02:55 +00:00
..
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2017-10-15 15:02:55 +00:00
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