Make the service/name CLI short args match the long args

[ericsampson]

The current mismatch of -n / --service and -s / --name is really confusing.

I know this would probably have to be in some sort of major release, communicated beforehand, etc But I wanted to throw this PR out to start a discussion at least :)

Another option that wouldn't involve making a breaking change could be adding an alias like -sn for spanName and -sv for --service