Add regression testing tool
Add regression testing tool

Tool detects if a gerrit patch contains tests to detect a regression

Usage: ./tools/regression_tester.py gerrit_review_number

Change-Id: I6353d1efda73fe5fc3098f928b6da9a28eb40590

zancas/hacking,emonty/oslo-hacking,hyakuhei/cleantox,hyakuhei/cleantox,openstack-dev/hacking,openstack-dev/hacking,zancas/hacking,emonty/oslo-hacking