spark git commit: [SPARK-6986] [SQL] Use Serializer2 in more cases.

Repository: spark Updated Branches: refs/heads/branch-1.4 28d423870 - 9d0d28940 [SPARK-6986] [SQL] Use Serializer2 in more cases. With https://github.com/apache/spark/commit/0a2b15ce43cf6096e1a7ae060b7c8a4010ce3b92, the serialization stream and deserialization stream has enough information

spark git commit: [SPARK-6986] [SQL] Use Serializer2 in more cases.

Repository: spark Updated Branches: refs/heads/master 92f8f803a - 3af423c92 [SPARK-6986] [SQL] Use Serializer2 in more cases. With https://github.com/apache/spark/commit/0a2b15ce43cf6096e1a7ae060b7c8a4010ce3b92, the serialization stream and deserialization stream has enough information to