TAJO-1259: Change tsql history behavior. (Jaewoong Jung via hyunsik)

Closes #316
TAJO-1249: Tajo should check if a file format given in DDL is supported. (DaeMyung Kang via hyunsik)

Closes #313
TAJO-1268: tajo-client module should not use UserGroupInformation.

Closes #318