Added jobStats on old role page. Disabled job status badge.

Added jobStats on role page.

We have stopped counting recently failed task count which is used to display the health badge.
Since this badge is being removed from the new UI, removed it from the old UI as well.

Testing Done:
./gradlew clean build
gradlew run

Bugs closed: AURORA-271

Reviewed at https://reviews.apache.org/r/19323/