Bump src/rep

Bump cloudfoundry-incubator/rep:
  Alex Suraci:
     loosen up timeouts in maintain tests ( Travis Success: https://travis-ci.org/cloudfoundry-incubator/rep/builds/30790231 )
     switch to lager ( Travis Failed: https://travis-ci.org/cloudfoundry-incubator/rep/builds/30780220 )
     deps ( Travis Unknown )
     bump deps; fix yagnats usage ( Travis Success: https://travis-ci.org/cloudfoundry-incubator/rep/builds/30768600 )
  Ted Young:
     bump deps; fix yagnats usage ( Travis Success: https://travis-ci.org/cloudfoundry-incubator/rep/builds/30708808 )
     delete container after complete callback ( Travis Unknown )