actually pass arguments to run_tests script

previously, I only though I was passing arguments.

Turns out you actually have to tell bash to expect and
reume them.

lame

files/run_tests.sh

@@ -6,4 +6,4 @@ pip install virtualenv
 virtualenv test_env --system-site-packages
 source test_env/bin/activate
 pip install -I anyjson nose httplib2 pika unittest2 lxml testtools testresources paramiko
-./run_tests.sh
+./run_tests.sh $*