Updated openstack/openstack
Project: openstack/heat  d33a5837d1f5ff7877968cf95888b53b2fab25ef

Remove run_tests.sh

This tool is deprecated in favor of tox for a long time already.
Moreover, currently it is broken as it tries to run
our in-tree integration tests as well.

So instead of fixing it, just finally remove it.

Change-Id: Icb3c4d423031456b8b24a84e97e310df077d9990