Change instance name for CloudSQL
Change instance name for CloudSQL

CloudSQL does not allow underscores, but it does allow hyphens
Other services do not allow hyphens, but they do allow underscores

rifung/gcp-service-broker,joshlong/gcp-service-broker,GoogleCloudPlatform/gcp-service-broker,rifung/gcp-service-broker,GoogleCloudPlatform/gcp-service-broker,rifung/gcp-service-broker,joshlong/gcp-service-broker,rifung/gcp-service-broker