j2k: flatten test cases and testData directory structure

Move j2k/test/tests -> j2k/tests, j2k/test/testData -> j2k/testData

j2k/testData/fileOrElement/literalExpression/endsWithDFL.java

@@ -0,0 +1,22 @@
+//file
+class Test {
+  void test() {
+    long l1 = 10L;
+    double d1 = 10.0D;
+    float f1 = 10.0F;
+
+    long l2 = 10l;
+    double d2 = 10.0d;
+    float f2 = 10.0f;
+  }
+
+  void testBoxed() {
+      Long l1 = 10L;
+      Double d1 = 10.0D;
+      Float f1 = 10.0F;
+
+      Long l2 = 10l;
+      Double d2 = 10.0d;
+      Float f2 = 10.0f;
+    }
+}