bump switchboard
bump switchboard

Submodule src/github.com/cloudfoundry-incubator/switchboard 6472ffe..0ecf7c1:
  > removing consul lock for switchboard[#135490687]

Signed-off-by: Johanna Smith <2fc3028b35264835a509c10d755513fc3ce1357b@pivotal.io>

cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release