Fixed unresolved promise in cancelQuery(..) ... (#3666)
Fixed unresolved promise in cancelQuery(..) ... (#3666)

cancelQuery(..) was attempting to
"cancel the cancellation" after 100ms.  However, it was not
actually achieving this objective.  In reality, the cancellation
was still running in the background even though the caller had
already moved on.

Later on, the cancellation would ACTUALLY fail due to a resource
allocation issue (ie: no more connections in the Tarn pool).
This would then result in an unhandled Promise rejection.

tgriesser/knex,abegines/knex,tgriesser/knex,abegines/knex,tgriesser/knex