fix: modify the naming method to reduce the gRPC's request bytes

[qmloong]

MiB unit may reach gRPC package limit 4MiB

fix: #39

[cheyang]

I recommend to use GiB instead of MiB as request. Or You can make the unit as 128MiB or 255MiB. Please check this issue: https://github.com/AliyunContainerService/gpushare-scheduler-extender/issues/16

[qmloong]

ok, thanks