Update the Build model _stage method to remove legacy
Update the Build model _stage method to remove legacy

RickyCook/DockCI,RickyCook/DockCI,sprucedev/DockCI,sprucedev/DockCI,RickyCook/DockCI,sprucedev/DockCI,RickyCook/DockCI,sprucedev/DockCI-Agent,sprucedev/DockCI,sprucedev/DockCI-Agent