TAJO-1204: Remove unused ServerName class. (DaeMyung Kang via jaehwa)
TAJO-1165: Needs to show error messages on query_executor.jsp. (Jihun Kang via jaehwa)
TAJO-1119: JDBC driver should support TIMESTAMP type. (jaehwa)
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into TAJO-1095