seperate refstack tester from refstack

To allow the tester to be installed and run outside of the refstack project
we have decided to move it into its own project.

moved to approved and added work items to storyboard:
https://storyboard.openstack.org/#!/story/133

Change-Id: If789122e76927641fb4ce53485d0bebc3c3b21b0
blueprint: seperate-refstack-tester-from-refstack