[SPARK-13642][YARN] Changed the default application exit state to failed for yarn cluster mode

## What changes were proposed in this pull request?

Changing the default exit state to `failed` for any application running on yarn cluster mode.

## How was this patch tested?

Unit test is done locally.

CC tgravescs and vanzin .

Author: jerryshao <sshao@hortonworks.com>

Closes #11693 from jerryshao/SPARK-13642.