Removed commented OGS-5 code form ProcessInfo.{cpp,h}.
Removed unnecessary include and forward declaration.
Using reference instead of full copy.
Adding include in the test instead of the xml interface impl. file.
Creating GEOObjects or GEOModels instance within class ProjectData.

As a consequence removed the method ProjectData::setGEOObjects().
Moved managing of ProjectData one level deeper in the inheritance hierarchy of XMLInterface.
Using GEOObjects instances directly instead of always fetching it from class ProjectData.
Changed sequence of arguments (output,input) -> (input,output).