bump auction executor rep

Submodule src/github.com/cloudfoundry-incubator/auction 31931a3..9d03a47:
  > pass full auction info when reserving/releasing
Submodule src/github.com/cloudfoundry-incubator/executor cf0aa98..713673a:
  > restore callback functionality for now
  > container is fully specified at allocation time
  > container can be created with tags
  > namespace executor-specified properties
  > remove container complete callback functionality
Submodule src/github.com/cloudfoundry-incubator/rep 951c65e..544988c:
  > provide full container info when reserving

Signed-off-by: Johannes Petzold <jpetzold@pivotal.io>