S: add tests for get/put step version hrefs
S: add tests for get/put step version hrefs

Signed-off-by: Bohan Chen <c9a015a7f6482b47c219aa2cbd78ba6c88c0a327@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse