Revert "[SPARK-2410][SQL] Merging Hive Thrift/JDBC server"

This reverts commit 06dc0d2c6b69c5d59b4d194ced2ac85bfe2e05e2.

#1399 is making Jenkins fail.  We should investigate and put this back after its passing tests.

Author: Michael Armbrust <michael@databricks.com>

Closes #1594 from marmbrus/revertJDBC and squashes the following commits:

59748da [Michael Armbrust] Revert "[SPARK-2410][SQL] Merging Hive Thrift/JDBC server"