Removed restriction annotation which is not required with Open JDK

src/main/java/org/gcube/informationsystem/utils/discovery/ReflectionUtility.java

@@ -139,7 +139,6 @@ public class ReflectionUtility {
 	 * @throws ClassNotFoundException
 	 *             if something went wrong
 	 */
-	@SuppressWarnings("restriction")
 	public static List<Class<?>> getClassesForPackage(String pckgname)
 	        throws ClassNotFoundException {
 	    final List<Class<?>> classes = new ArrayList<Class<?>>();