spark git commit: [SPARK-18086] Add support for Hive session vars.

Repository: spark Updated Branches: refs/heads/branch-2.1 4af82d56f -> 29f59c733 [SPARK-18086] Add support for Hive session vars. ## What changes were proposed in this pull request? This adds support for Hive variables: * Makes values set via `spark-sql --hivevar name=value` accessible *

spark git commit: [SPARK-18086] Add support for Hive session vars.

Repository: spark Updated Branches: refs/heads/master 3eda05703 -> 9b0593d5e [SPARK-18086] Add support for Hive session vars. ## What changes were proposed in this pull request? This adds support for Hive variables: * Makes values set via `spark-sql --hivevar name=value` accessible * Adds