implemented tags for items

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

core/src/main/java/de/srsoftware/umbrella/core/model/DbLocation.java

@@ -36,6 +36,10 @@ public class DbLocation extends Location {
 		return new DbLocation(rs.getLong(ID), OwnerRef.of(rs), rs.getLong(PARENT_LOCATION_ID), rs.getString(NAME),rs.getString(DESCRIPTION));
 	}
 
+	public Owner owner(){
+		return owner;
+	}
+
 	public Long parent(){
 		return parentLocationId;
 	}