Checker test: (Hopefully) work around race condition in metrics queue
Checker test: (Hopefully) work around race condition in metrics queue

This is a bit ugly, but should not have practical relevance outside of
tests.

Co-authored-by: Simon Ruderich <088e16a1019277b15d58faf0541e11910eb756f6@ruderich.org>

fausecteam/ctf-gameserver,fausecteam/ctf-gameserver,fausecteam/ctf-gameserver,fausecteam/ctf-gameserver,fausecteam/ctf-gameserver