JetDiagnosticsTest migrated to TestGenerator

- test data files renamed from *.jet to *.kt

compiler/testData/diagnostics/tests/j+k/kt1402.kt

@@ -0,0 +1,26 @@
+// FILE: a/M.java
+package a;
+
+public class M {
+    public static class Inner {
+        private int i;
+        public Inner(int i) {
+            this.i = i;
+        }
+
+        public int getI() {
+            return i;
+        }
+    }
+}
+
+// FILE: b.kt
+package b
+
+import a.M.Inner
+
+fun foo() {
+    doSmth(Inner(87))
+}
+
+fun doSmth(b: Inner) = b