bump rep
bump rep

[finishes #103911978]

Submodule src/github.com/cloudfoundry-incubator/rep 8ea99b3..3981821:
  > Merge pull request #3 from stefanschneider/expect-new-http-error

Signed-off-by: Jen Spinney <475b118f8db4f150e7ed3b69b35fd7c857f9c9f8@hp.com>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release