CI should fail when there's a test failing
CI should fail when there's a test failing

Summary: The test script is not returning a non-zero exiting code when a test has failed, causing CI to think it has passed. Changing it to print what has failed and exit with 1.

Reviewed By: agampe

Differential Revision: D24611602

fbshipit-source-id: 33357b4d8f4568c37e3ac049d925952307b87562

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex