Fixed a customer issue (Zendesk: 3842): Using XMLEscapingTemplateEngine in Groovy.
This is actually a backward incompatible change.
adding TemplateEngine that does XML escaping by default
confirming the XML escaping behaviour of the Jelly transformer
made the mandatory name attribute unremovable.
... this by providing the opportunity for the parent object to designate a value in repeatable object as such.