bump route-emitter
bump route-emitter

Submodule src/code.cloudfoundry.org/route-emitter 63171be..3f7bea9:
  > Stop timer to avoid suspected race condition in tests

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

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