Code cleaning. Ref #69

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/check/DefaultParameter.java

@@ -73,13 +73,7 @@ public class DefaultParameter implements Serializable {
 	 */
 	@Override
 	public String toString() {
-		StringBuilder builder = new StringBuilder();
-		builder.append("DefaultParameter [name=");
-		builder.append(name);
-		builder.append(", value=");
-		builder.append(value);
-		builder.append("]");
-		return builder.toString();
+        return "DefaultParameter [name=" + name + ", value=" + value + "]";
 	}
 
 }