Unmock and disable tests in the React renderer

Summary:
We should unmock React just because we do that elsewhere and tests work better
that way. I was trying to get React tests working in this repo but because
we do so many special things in the React Core repo I gave up.

These test run in the React Core repo already.

Reviewed By: spicyj, bvaughn

Differential Revision: D4541126

fbshipit-source-id: ffbb1b76aac910a976222db91b80b8839fcecc60

package.json

@@ -24,6 +24,7 @@
       "^[./a-zA-Z0-9$_-]+\\.png$": "RelativeImageStub"
     },
     "testPathIgnorePatterns": [
+      "Libraries/Renderer",
       "/node_modules/",
       "/website/",
       "local-cli/templates/"
@@ -73,6 +74,8 @@
       "<rootDir>/website/"
     ],
     "unmockedModulePathPatterns": [
+      "node_modules/react/",
+      "Libraries/Renderer",
       "promise",
       "source-map",
       "fastpath",