j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/issues/doNotQualifyStatic.kt

@@ -0,0 +1,12 @@
+class Outer {
+
+    public class Nested {
+        public fun foo() {
+            o = null
+        }
+    }
+
+    class object {
+        public var o: Any? = Object()
+    }
+}