[SPARK-10692] [STREAMING] Expose failureReasons in BatchInfo for streaming UI to clear failed batches

Slightly modified version of #8818, all credit goes to zsxwing

Author: zsxwing <zsxwing@gmail.com>
Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #8892 from tdas/SPARK-10692.