new method in workunit dll to retrieve a minimal amount of info for a graph

IConstWorkUnit::getGraphs() is used by the existing WsWorkunits.WUInfo to get the graph name, label, etc. For some workunit, it is too expensive since the getGraphs() reads all of info about each graph. A new IConstWorkUnit method is needed to get the following info about each graph: 1. name which, currently, is read by IConstWUGraph::getName(); 2. label which, currently, is read by IConstWUGraph::getLabel(); 3. type which, currently, is read by IConstWUGraph::getTypeName(); 4. is it running and running ID – based on graph name matching with IConstWorkUnit::getRunningGraph(); 5. graphstate which, currently, is read from IConstWorkUnit::getGraphProgress().

Some work on dali side may be needed.