SPARK-11314: Add service API and test service for Yarn Cluster schedulers.

SPARK-11315: Add YARN extension service to publish Spark events to YARN timeline service.

SPARK-11323: Add History Service Provider to service application histories from YARN timeline server.

SPARK-12417: Support to have ORC bloom filters during write code path.

SPARK-12898: Consider having dummyCallSite for HiveTableScan.

SPARK-12925: Improve HiveInspectors.unwrap for StringObjectInspector.getPrimitiveWritableObject.