TAJO-1211: Staging directory for CTAS and INSERT should be in the output dir.

Closes #274
TAJO-1190: INSERT INTO to partition tables may cause NPE.

Closes #250
TAJO-1183: Keep command execution even with errors. (Jaewoong Jung via hyunsik)

Closes #266
TAJO-1222: DelimitedTextFile should be tolerant against parsing errors.

Closes #277
TAJO-1220: Implement createStatement() and setEscapeProcessing() in  JdbcConnection. (YeonSu Han via hyunsik)
TAJO-1223: Wrong query verification against asterisk and more expressions in select list.

Closes #279
TAJO-1224: When there is no projected columns, json scan can be hang.

Closes #281
TAJO-1191: Change DateDatum timezone to UTC. (Jaewoong Jung via hyunsik)

Closes #278
TAJO-1194: 'INSERT OVERWRITE .. SELECT' does not remove existing data when result is empty. (jaehwa)

Closes #254
TAJO-1194: 'INSERT OVERWRITE .. SELECT' does not remove existing data when result is empty. (missing code)
TAJO-1231: Implicit table properties in session is not stored in table property.

Closes #287
TAJO-1213: Implement CatalogStore::updateTableStats. (jaehwa)

Closes #285
TAJO-1234: Rearrange timezone in date/time types.

Closes #290
Merge branch 'TAJO-1221' of https://github.com/blrunner/tajo into TAJO-1221
Added HAConstants.