Address review comments
Address review comments

pdecat/cloudsql-proxy,digiexchris/cloudsql-proxy,ankushagarwal/cloudsql-proxy,GoogleCloudPlatform/cloud-sql-proxy,GoogleCloudPlatform/cloud-sql-proxy,ankushagarwal/cloudsql-proxy,pdecat/cloudsql-proxy,digiexchris/cloudsql-proxy