Fix coverage generation

This patch makes a few small changes that will get tox -ecover
working again.

Change-Id: If67b0ad11226ff0f5774ace968277cd400f78655

.coveragerc

@@ -1,7 +1,7 @@
 [run]
 branch = True
-source = brick
-omit = brick/tests/*,brick/openstack/*
+source = os_brick
+omit = os_brick/tests/*
 
 [report]
 ignore_errors = True

.gitignore

@@ -29,6 +29,7 @@ nosetests.xml
 .venv
 tools/lintstack.head.py
 tools/pylint_exceptions
+cover
 
 # Translations
 *.mo

tox.ini

@@ -33,7 +33,10 @@ commands = bash tools/lintstack.sh
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py testr --coverage --testr-args='{posargs}'
+# To see the report of missing coverage add to commands
+#   coverage report --show-missing
+commands =
+  python setup.py test --coverage --coverage-package-name=os_brick --testr-args='{posargs}'
 
 [testenv:docs]
 commands = python setup.py build_sphinx