HIVE-8300: Missing guava lib causes IllegalStateException when deserializing a task [Spark Branch]

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1628446 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8278: Restoring a graph representation of SparkPlan [Spark Branch] (Chao via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1628450 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8302: GroupByShuffler.java missing apache license header [Spark Branch] (Chao via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1628452 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8180: Update SparkReduceRecordHandler for processing the vectors [spark branch] (Chinna via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1628570 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8180: Update SparkReduceRecordHandler for processing the vectors [spark branch] (adding new files missed from previous commit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1628571 13f79535-47bb-0310-9956-ffa450edef68