bump vizzini
bump vizzini

[finishes #148060263]

Submodule src/code.cloudfoundry.org/vizzini c08a2736..dc2023ad:
  > explain how to run vizzini for different deployment styles

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