sky: Update token_issuer tests
sky: Update token_issuer tests

concourse/concourse#2670

Signed-off-by: Rui Yang <10d6ef426b5f71d33c3d9e2459db4a0e3700cdde@pivotal.io>

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