Bump docker-circus, inigo, linux-circus, runtime-schema, stager, cf-acceptance-tests, gunk

Bump cloudfoundry-incubator/docker-circus:
  Michael Fraenkel:
     Add detected start command ( Travis created: https://travis-ci.org/cloudfoundry-incubator/docker-circus/builds/35973061 )
Bump cloudfoundry-incubator/inigo:
  Michael Fraenkel:
     Add detected start command
Bump cloudfoundry-incubator/linux-circus:
  Michael Fraenkel:
     Add detected_start_command ( Travis created: https://travis-ci.org/cloudfoundry-incubator/linux-circus/builds/35973040 )
Bump cloudfoundry-incubator/runtime-schema:
  Michael Fraenkel:
     Add detected_start_command ( Travis created: https://travis-ci.org/cloudfoundry-incubator/runtime-schema/builds/35973001 )
Bump cloudfoundry-incubator/stager:
  Michael Fraenkel:
     Add detected_start_command ( Travis created: https://travis-ci.org/cloudfoundry-incubator/stager/builds/35973087 )
  Abhijit Hiremagalur:
     Use natsclientrunner ( Travis Success: https://travis-ci.org/cloudfoundry-incubator/stager/builds/35785602 )
Bump cloudfoundry/cf-acceptance-tests:
  Eric Malm and Luan Santos:
     Update process type test to match DetectedStartCommand
  Julian Friedman and Luan Santos:
     Add initial tests for process types
Bump cloudfoundry/gunk:
  Abhijit Hiremagalur:
     Retrofit tests
     Extract NatsClientRunner from runtime-metrics-server