Investigate how to make int-tests idempotent

[Amrith Kumar]

This is an action item from the Trove Mid-cycle meetup in Seattle and will be assigned to edmondk.

Some details are found in the etherpad https://etherpad.openstack.org/p/trove-kilo-sprint-state-of-ci but I believe we know what this means.

http://en.wikipedia.org/wiki/Idempotence
http://www.restapitutorial.com/lessons/idempotency.html

I'm marking this for "Trove next"