Remove the useless run_tests.sh
Remove the useless run_tests.sh

The script is actually useless today. I believe no one is using this
script to run any tests.

Change-Id: I4e02805ea95d62c2eeb3cf892a6a68a71f6d7efe

openstack/senlin,stackforge/senlin,openstack/senlin,stackforge/senlin,openstack/senlin