Revision 1379937

A slightly modified patch from Nicolas Malin "change serviceName by customMethod on Content " https://issues.apache.org/jira/browse/OFBIZ-5020

When you used a content as template, the content.serviceName value used to call the context populate service before rendering.
I propose to replace serviceName field by customMethodId and use customMethod pattern for more flexibility.
serviceName field is kept for backward compatibility

Thanks to Scott and Adrian for support