bump vizzini
bump vizzini

[finishes #103637092]

Submodule src/github.com/cloudfoundry-incubator/vizzini efe67af..2c3df97:
  > Vizzini no longer takes --consul-address

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