V2 WIP:

* Added application_repository.rb + tests
* Configure/deconfig WIP -- Tests having selinux issue running setup
* Add unit test for v2 model, minor cleanup
* Implement util cgroups methods
* Add comment for v2 destroy
* Mock cartridge WIP
* Fix private endpoint availability checks
Merge pull request #34 from pmorie/dev/v2_wip

V2 WIP: