JBPM 6.x Dashboards migration tool

In version 7, old dashbuilder is going to be replaced by a new workbench based solution. In order to support existing customer a migration path is required => https://issues.jboss.org/browse/JBPM-5163

Our aim is to deliver a migration tool to automate the process. It doesn’t seem an easy task though, since dashboard structure, components and storage are totally different. The minimum requirement to satisfy is to be able to create dashboards templates in the workbench's page builder from existing old dashboard definitions.