Adding tests to coverage report.

Author: dhermes

tox.ini

@@ -22,13 +22,15 @@ commands =
     nosetests \
       --with-coverage \
       --cover-package=oauth2client \
+      --cover-package=tests \
       --cover-erase \
       --cover-tests \
       --cover-branches \
       --ignore-files=test_appengine\.py
     nosetests \
       --with-coverage \
       --cover-package=oauth2client.appengine \
+      --cover-package=tests.test_appengine \
       --with-gae \
       --cover-tests \
       --cover-branches \