Support Submitting Jobs to Cloud Providers Managed Spark Clusters

To be able to submit jobs to prominent cloud providers managed spark clusters, "spark-submit" can be enhanced. For example, to submit job to "google cloud dataproc", the "spark-submit" can be enhanced to issue "gcloud dataproc jobs submit spark ..." when "–master gcd://cluster-name" arg is used. Once this feature is accepted and prioritized, then it can be rolled out in current and future versions of spark and also back ported to a few previous versions. I can raise the pull request.