tests.run: stop incorrectly enabling our custom plugin
tests.run: stop incorrectly enabling our custom plugin

This fixes the --failed flag (among others) to nose.

Reviewed-by: Sverre Rabbelier

--HG--
extra : rebase_source : 8d121f939515fd8092d1aeea2ffa9c05feb5db33

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son