Computes the under-utilized services in the case where where minCount
is non-zero and we do not have pre-computed #serviceScores on hand. If
there are also no active services, then this awaits the join of at least
one service. Once it has at least one service that is not the optionally
excluded service, it returns the "under-utilized" services.
TimeoutException - If the result could not be obtained before the timeout was