Added BenchmarkCreateRequest.
Added BenchmarkCreateRequest.

alphagov/radix,bpowers/radix,fzzy/radix,bpowers/radix,ctrlaltdel121/radix,beni55/radix,trigrass2/radix,mediocregopher/radix.v3,mediocregopher/radix.v2,gabrielperezs/radix.improved,rightscale/radix