Remove references to removed watcher/openstack directory

Since we removed openstack/common this is not useful.

Change-Id: Ifb8e1cdacd1879874be7496a8bc4bc8349085456

tox.ini

@@ -19,7 +19,7 @@ commands = flake8
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py testr --coverage --omit="watcher/tests/*,watcher/openstack/*" --testr-args='{posargs}'
+commands = python setup.py testr --coverage --omit="watcher/tests/*" --testr-args='{posargs}'
 
 [testenv:docs]
 commands = python setup.py build_sphinx
@@ -43,7 +43,7 @@ commands =
 show-source=True
 ignore=E123,E125,H404,H405,H305
 builtins= _
-exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,*sqlalchemy/alembic/versions/*,demo/
+exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,*sqlalchemy/alembic/versions/*,demo/
 
 [testenv:pypi]
 commands =