improvements for cloud.sh
improvements for cloud.sh

- remove quotes around ${#PROVIDERS[@]}
- remove unused return statements

mesosphere-mergebot/mergebot-test-dcos,GoelDeepak/dcos,amitaekbote/dcos,GoelDeepak/dcos,mesosphere-mergebot/mergebot-test-dcos,GoelDeepak/dcos,amitaekbote/dcos,GoelDeepak/dcos,dcos/dcos,mesosphere-mergebot/dcos,kensipe/dcos,kensipe/dcos,surdy/dcos,branden/dcos,mesosphere-mergebot/mergebot-test-dcos,amitaekbote/dcos,mellenburg/dcos,mesosphere-mergebot/dcos,surdy/dcos,dcos/dcos,branden/dcos,kensipe/dcos,dcos/dcos,mellenburg/dcos,mesosphere-mergebot/dcos,branden/dcos,amitaekbote/dcos,kensipe/dcos,mesosphere-mergebot/mergebot-test-dcos,dcos/dcos,mellenburg/dcos,surdy/dcos,mesosphere-mergebot/dcos,dcos/dcos,surdy/dcos,branden/dcos,mellenburg/dcos