waitForCurOpByFailPoint shouldn't ignore filter parameter in 4.4

In master, the waitForCurOpByFailPoint() helper takes an optional filter argument and uses it to wait for a matching operation to hit a fail point. jstests/sharding/kill_pinned_cursor.js uses waitForCurOpByFailPoint() with a filter argument in 4.4 but in 4.4 the helper ignores the filter.