HPCC-10874 Incorrect logic in deleteLRUPersists

Picked up by coverity scan - a continue that was intended to redo an outer
loop is in fact working on an inner loop. In practice, the difference is
likely to be undetectable.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
HPCC-0000 WIP

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #5419 from richardkchapman/persist-lru2

HPCC-10874 Incorrect logic in deleteLRUPersists

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>