Notify user on Service-Name mismatch

[MMunier]

A lot of times the checker are only separated by port.
If a different checker answers (i.e. someone entered the wrong port in the CTF.json),
it isn't immediately obvious by looking at the by looking at the Scoreboard.

Since the service_info already contains the servicename to display, we should notify the user of a mismatch (in the log),
or (if easily possible) show both names in the scoreboard.