bump baggageclaim
bump baggageclaim

Submodule src/github.com/concourse/baggageclaim 956ea17..6f532e6:
  > nuke pester, not really a good idea for baggageclaim

concourse/concourse,concourse/concourse,cjcjameson/concourse,cjcjameson/concourse,cjcjameson/concourse,concourse/concourse,concourse/concourse,concourse/concourse