Merge to XFA: Use JS_ExpandKeywordParams() in app.response()

testing/resources/javascript/app_repsonse.in

 {{header}}
 {{object 1 0}} <<
   /Type /Catalog
   /Pages 2 0 R
   /OpenAction 10 0 R
 >>
 endobj
 {{object 2 0}} <<
   /Type /Pages
   /Count 1
@@ skipping 16 matching lines @@
 {{object 10 0}} <<
   /Type /Action
   /S /JavaScript
   /JS 11 0 R
 >>
 endobj
 % JS program to exexute
 {{object 11 0}} <<
 >>
 stream
-app.alert("This test passes if alert() logs output under the test utility.");
-app.alert("message", 1, 2, "title");
-app.alert({"cMsg": "message", "cTitle": "title"});
-app.alert({"cMsg": "message", "cTitle": "title", "nIcon": 3, "nType": 4});
-app.alert(undefined);
-app.alert(null);
-app.alert(true);
-app.alert(false);
-app.alert(42);
-app.alert([1, 2, 3]);
-app.alert([1, 2, {"color": "red"}]);
-app.alert({"color": "red"}, 5, 6, "title"); 
+var result;
 try {
-  app.alert();
+  result = app.response("question");
+  app.alert("result: " + result);
+  result = app.response("question", "title", "default", true, "label");
+  app.alert("result: " + result);
+  result = app.response({"cQuestion": "question"});
+  app.alert("result: " + result);
+  result = app.response({
+    "cQuestion": "question",
+    "cTitle": "title",
+    "cDefault": "default",
+    "bPassword": true,
+    "cLabel": "label"
+  });
+  app.alert("result: " + result);
+} catch (e) {
+  app.alert("unexpected error " + e);
+}
+try {
+  app.response();
+  app.alert("unexpected success");
 } catch (e) {
   app.alert("Caught expected error " + e);
 }
 try {
-  app.alert({});
+  app.response({});
+  app.alert("unexpected success");
 } catch (e) {
   app.alert("Caught expected error " + e);
 }
-try {
-  app.alert({"color": "red", "size": 42});
-} catch (e) {
-  app.alert("Caught expected error " + e);
-}
 endstream
 endobj
 {{xref}}
 trailer <<
   /Root 1 0 R
 >>
 {{startxref}}
 %%EOF