Update + use node-haste2

Summary:This updates jest to 0.9 which will result in *much* faster startup time (1s vs. 10-15s) and better runtime overall (2-3x).

The route gen and cli integration tests are failing locally, but also on master. javache is this expected right now or is this related to my changes?

Reviewed By: javache

Differential Revision: D2943137

fb-gh-sync-id: 8b39ba5f51e30fbc5bacb84d67013ab0a4061f6e
shipit-source-id: 8b39ba5f51e30fbc5bacb84d67013ab0a4061f6e

react-packager/src/Server/__tests__/Server-test.js

@@ -10,6 +10,7 @@
 
 jest.setMock('worker-farm', function() { return () => {}; })
     .dontMock('os')
+    .dontMock('underscore')
     .dontMock('path')
     .dontMock('url')
     .setMock('timers', { setImmediate: (fn) => setTimeout(fn, 0) })

react-packager/src/SocketInterface/__tests__/SocketInterface-test.js

@@ -11,6 +11,7 @@
 jest.setMock('worker-farm', function() { return () => {}; })
     .setMock('uglify-js')
     .mock('child_process')
+    .dontMock('underscore')
     .dontMock('../');
 
 var SocketInterface = require('../');