lib: fix access-list deletion

lib: fix access-list deletion

Problems with the current implementation:
* Delete hook is called before the deletion of the access-list from the
  master list, which means that daemons processing this hook successfully
  find this access-list, store a pointer to it in their structures, and
  right after that the access-list is freed. Daemons end up having stale
  pointer to the freed structure.
* Route-maps are not notified of the deletion.

This commit fixes both issues.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>