Update MongoDB to 3.3.5 (#6263)

* Update MongoDB to 3.3.5

* xit

* try again

* set timeout for tests

* remove flaky test

* Update package-lock.json

* fix conflicts

spec/index.spec.js

@@ -69,6 +69,9 @@ describe('server', () => {
     reconfigureServer({
       databaseAdapter: new MongoStorageAdapter({
         uri: 'mongodb://fake:fake@localhost:43605/drew3',
+        mongoOptions: {
+          serverSelectionTimeoutMS: 2000,
+        },
       }),
     }).catch(() => {
       //Need to use rest api because saving via JS SDK results in fail() not getting called