function overrides existing getUsed. Rename helper function

code/moya-database/src/main/java/fi/codecrew/moya/model/PlaceSlot.java

@@ -51,7 +51,7 @@ public class PlaceSlot extends GenericEntity {
 		this.created = Calendar.getInstance().getTime();
 	}
 
-	public boolean isUsed() {
+	public boolean isSlotUsed() {
 		return used != null || place != null;
 	}
 

code/moya-web/src/main/java/fi/codecrew/moya/web/cdiview/map/AjaxMapView.java

@@ -136,7 +136,7 @@ public class AjaxMapView extends GenericCDIView {
 			Slotcounter pm = prodmap.get(p.getProduct());
 			pm.increment();
 			logger.info("got used {} for slot {} with place {}", p.getUsed(), p, p.getPlace());
-			if (!p.isUsed()) {
+			if (!p.isSlotUsed()) {
 				pm.incrementUnused();
 			}
 		}