New J2K: Split old j2k and new j2k tests

nj2k/testData/newJ2k/equals/Equals4.java

@@ -0,0 +1,5 @@
+class C{
+    boolean foo(String s1, String s2, String s3, String s4) {
+        return s1.equals(s2) == !s3.equals(s4)
+    }
+}