First iteration of OpenStack reaper for testing

Also, attempt to fix incomplete tagging for Deployer
Copy from immutable map
Try to fix state change for reaper
Altered persistent store of terminated instances to Amazon since
OpenStack api does not provide this.
Properly hook up sensu name
Factor out listing of dead instances, we cannot rely upon the cloud

Turns out clouds don't maintain listing of recently killed instances as
a lowest common denomintor
Simplify conversion from cloudid to sensu name
Merge pull request #14 from CloudBindle/feature/pancancer-179

Feature/pancancer 179