Check how adding extra resources to a resource group already created works

[icasrod]

RequestFlows assign an internal id to groups of resources selected, independently of the workgroup used. This id is used later to release all or part of these resources, using the same or different workgroups. It is no clear what happens when you use the same id to invoke a new RequestFlow: does it overwrite the all group? does it add the new resources to the same group?