11.4.12 Update a Collection of Entities: add examples

JSON Format Add JSON request and response examples using Core.ContentID  and Core.DataModificationException , also in combination for a failed create. Show the different error handling for continue-on-error=true/false . Show that Core.DataModificationException records can be annotated by adding  Common.additionalTargets to a MessageType record. Protocol Make first occurrence of  continue-on-error a section link,