WIP Cartridge Refactor - Refactor V2CartridgeModel to use CartridgeRepository

* Update calls, tests, etc
WIP Cartridge Refactor - Introduce oo-admin-cartridge command

* Add command and update spec file
WIP Cartridge Refactor - Refactor V2CartridgeModel to use CartridgeRepository

* Update calls, tests, etc

Conflicts:
	node/test/functional/v2_cart_model_func_test.rb
WIP Cartridge Refactor - Mock plugin installed from CartridgeRepository