TAJO-20: INSERT INTO ... SELECT. (Hyoungjun Kim via hyunsik)

Closes #72
TAJO-945: Connecting to Tajo by JDBC driver failed with SQL Exception "Invalid JDBC URI". (Mai Hai Thanh via jihoon)
Merge branch 'master' of http://git-wip-us.apache.org/repos/asf/tajo into TAJO-837
TAJO-837