Functionality to display spatial unit group editor layers

Includes changes to pass hierarchy_level values from spatial_unit_group table so as to use just one sld (sug_hierarchy.xml)
Changes SpatialResult entity in SearchEJB project, SpatialSearchResultTO in BoundaryTransferObject project and updated
getFeaturesFromData method in PojoFeatureSource class in Clients GIS project
Changes to system.config_map_layer, system.query table. And a new cadastre.hierarchy view