YADE should resolve the ${scheduduler_file_path} variable in the FilePath

Current Situation

• When editing a profile of a YADE settings file the YADE XSD schema forces the the Selection tag.
• When the profile should be used in a file order source job chain no selection is necessary as the name of the file that is to be transfered will be set by the order parameter scheduler_file_path.
• The YADE XSD schema does not enforce use of a <Selection> element for release 1.12.0, see YADE-452

Desired Behaviour

• The YADE XSD schema should enforce use of the <Selection> element.
• To be able to configure a profile for a YADE job that is used in a file order source job chain the configuration element FilePath (file_path) should be set to the predefined variable: ${scheduler_file_path}.
  This variable will be resolved at run-time.