Fix tox does not pass arguments to nose

When testing with tox we currently cannot test a specific file, it
is due to the fact that tox does not pass the arguments to nose.

By adding {posargs} at the end of the tox target which are using
nose, we can now use all of its features

Change-Id: If59830669fabb704cb9b6348819c6cec4060088a
Closes-Bug: #1306016
Co-Authored-By: florent <florent.flament-ext@cloudwatt.com>
Merge "Fix tox does not pass arguments to nose"