Duplicate JPASupport messages to plugins

When using the search module, each item was being indexed several times per JPA save. I traced this back to duplicate JPASupport.objectPersisted/JPASupport.objectUpdated messages been called. JPASupport.save() calls saveAndCascade(true), then later in same method calls, saveAndCascade(false), and the JPASupport.objectUpdated event is triggered in both of these.