[#133463119] Replace ssh-proxy-lb and router-lb with ssh-proxy-and-router-lb vm_extensions
[#133463119] Replace ssh-proxy-lb and router-lb with ssh-proxy-and-router-lb vm_extensions

Signed-off-by: Chunyi Lyu <0f8e751eae2b6087fa04691c2ff75f586389adcc@pivotal.io>

cloudfoundry/cf-deployment,emalm/cf-deployment,cloudfoundry/cf-deployment