[ReactNative] Fix MessageQueue-test on open source

Summary:
@public

Fix mocking on MessageQueue-test

Test Plan: Run the test

Libraries/Utilities/__tests__/MessageQueue-test.js

@@ -8,9 +8,12 @@
  */
 'use strict';
 
-jest.dontMock('MessageQueue');
+jest.setMock('ReactUpdates', {
+  batchedUpdates: fn => fn()
+});
 
-var ReactUpdates = require('ReactUpdates');
+jest.dontMock('MessageQueue');
+jest.dontMock('keyMirror');
 var MessageQueue = require('MessageQueue');
 
 let MODULE_IDS = 0;
@@ -95,10 +98,6 @@ describe('MessageQueue', () => {
 
   describe('processBatch', () => {
 
-    beforeEach(() => {
-      ReactUpdates.batchedUpdates = (fn) => fn();
-    });
-
     it('should call __invokeCallback for invokeCallbackAndReturnFlushedQueue', () => {
       queue.__invokeCallback = jasmine.createSpy();
       queue.processBatch([{

jestSupport/scriptPreprocess.js

@@ -18,16 +18,13 @@ module.exports = {
   transformSource: transformSource,
 
   process: function(src, fileName) {
-    if (fileName.match(/node_modules/)) {
-      return src;
-    }
-
     try {
       return transformSource(src, fileName);
     } catch(e) {
-      throw new Error('\nError transforming file:\n  js/' +
+      console.error('\nError transforming file:\n  js/' +
         (fileName.split('/js/')[1] || fileName) + ':' + e.lineNumber + ': \'' +
         e.message + '\'\n');
+      return src;
     }
   }
 };