exhaust_cursor_currentop_integration_test should not drop getMore()'s read lock

For SERVER-40547, when test commands are enabled, we crash if nextNotIncreasing instead of throwing a WriteConflictException.

With the work done in SERVER-40547, it uncovered a violation in the integration_tests_standalone_audit suite for the exhaust_cursor_currentop_integration_test test with the following message:

WTCursor::next -- c->next_key ( RecordId(1)) was not greater than _lastReturnedId (RecordId(2)) which is a bug.

Evergreen patch with SERVER-40547 changes.

resmoke.py invocation for local usage:

buildscripts/resmoke.py --suites=integration_tests_standalone_audit