Added new endpoint to get project's single bucket usage rollup.
Extended generation code to handle service method args.
Change-Id: Ief768632a801c047c66e0617056fbd7b30427b33
Added a feture flag which will be used to indicate if new generated console api is used.
Fixed some comments from previous PR.
Change-Id: Ice31c998b0b347028a491c971a648fd1269bfd49