Fixing problems with tox
Fixing problems with tox

Remove option -w which throws an error:
nosetests: error: no such option: -w
,and add option verbose.

Change-Id: I81a6213b1651d61e381c906529bd15996a5819f2

stackforge/monasca-log-api,openstack/monasca-log-api,openstack/monasca-log-api,openstack/monasca-log-api,stackforge/monasca-log-api,stackforge/monasca-log-api