atc: change checker interval to 5s
atc: change checker interval to 5s

Signed-off-by: Joshua Winters <3dd3a5216811ba233723a4612ec3a917850b715d@pivotal.io>
Co-authored-by: Rui Yang <10d6ef426b5f71d33c3d9e2459db4a0e3700cdde@pivotal.io>

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