SQOOP-1118: Move PostgreSQL specific MR codes to org.apache.sqoop.mapreduce.posgresql

(Masatake Iwasaki via Jarek Jarcec Cecho)
SQOOP-1129: PostgreSQL direct test are failing on trunk

(Jarek Jarcec Cecho via Venkat Ranganathan)
SQOOP-1097: Export using procedures feature needs fixes for working with mysql

(Venkat Ranganathan via Jarek Jarcec Cecho)
SQOOP-1124: Direct export to PostgreSQL with PGBulkloadManager fails without explicit port number settings

(Masatake Iwasaki via Jarek Jarcec Cecho)
SQOOP-906: Sqoop is always calling ConnectionManager.datetimeToQueryString with TIMESTAMP column type

(Raghav Kumar Gautam via Jarek Jarcec Cecho)
SQOOP-1140: Enable overriding username, password and database in DB2 test

(Jarek Jarcec Cecho via Venkat Ranganathan)