Allow CATS & Smokes to execute out of cf-release

[#71360792]

Signed-off-by: Sabha Parameswaran <sparameswaran@gopivotal.com>
Signed-off-by: Matthew Sykes <matthew.sykes@gmail.com>

Conflicts:
	src/github.com/cloudfoundry-incubator/cf-smoke-tests
Add ability to build dev release using drone.

- Add Dockerfile used to generate image for drone.