Create NoRewardReward fragment and use it in ProjectFragment (#2777)

* Add tests for no-reward reward in Project+FetchProjectQueryDataTests

* Add NoRewardReward fragment

* Remove Prelude from Project+NoRewardReward adapter

* Add a test for Project+NoRewardReward adapter

* Make no-reward-reward fragment non-nullable in adapter

* Fix a warning

* Add another few assertions to Project_NoRewardRewardTests

Author: amy-at-kickstarter