HPCC-11253 Do not lock superfiles in roxie

Fix closedown issues with dalayedReleaser thread.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
HPCC-11253 Do not lock superfiles in roxie

DelayedReleaserThread was waking up too often.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>