Coverage report was't created

Usually, coverage report is created by "tox -ecover" command.
But it wasn't created. This fixes it.

Change-Id: If1096d70831e055d9d1f77a2fd08d28025c18597
Closes-Bug: #1374259

.coveragerc

@@ -0,0 +1,7 @@
+[run]
+branch = True
+source = os_refresh_config
+omit = os_refresh_config/tests/*
+
+[report]
+ignore-errors = True

.gitignore

@@ -23,6 +23,7 @@ pip-log.txt
 
 # Unit test / coverage reports
 .coverage
+cover
 .testrepository
 .tox
 nosetests.xml

.testr.conf

@@ -1,5 +1,4 @@
 [DEFAULT]
-test_command=python -m subunit.run discover . $LISTOPT $IDOPTION
+test_command=${PYTHON:-python} -m subunit.run discover -t ./ . $LISTOPT $IDOPTION
 test_id_option=--load-list $IDFILE
 test_list_option=--list
-

tox.ini

@@ -22,7 +22,7 @@ commands = flake8
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}
 commands =
-  python setup.py testr --coverage
+  python setup.py testr --coverage --coverage-package-name=os_refresh_config
 
 [testenv:venv]
 commands = {posargs}