Add a Parser service to Service Repository

This is a feature request to add the parser service:

http://fxapps.blogspot.com.br/2015/07/a-parser-work-item-handler-for-jbpm-6.html

to jbpm 6 service repository:

http://docs.jboss.org/jbpm/v6.2/userguide/jBPMDomainSpecificProcesses.html#d0e20515