TAJO-1259: A title in catalog configuration document is different from others. (Jongyoung Park via hyunsik)

Closes #310
TAJO-1206 Implements Thrift proxy server.

Change ThriftClient's thrift row decoder and Thrift Server's encoder which converts to string from any data type.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into TAJO-1206
TAJO-1206: Implements Thrift proxy server.

Remove debug log.