bump atc
bump atc

Submodule src/github.com/concourse/atc 6c1f0414..a32219d8:
  > Revert "Add recursive checking when scanning for resources so that resources"
  > Revert "Adding pipeline with resources depending on resources to simulate issue"

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