[java8] Added tests for using java language features in transformations.

test/transform/resource/before/ValDefault.java

@@ -0,0 +1,9 @@
+// version 8:
+interface ValDefault {
+	int size();
+	
+	default void method() {
+		lombok.val x = 1;
+		lombok.val size = size();
+	}
+}