ELEASE NOTES FIX BUGS: [TD-1407]: fix an issue coverity reports getenv() return a strin… [TD-1423]: fix bugs in group by nchar/binary columns. [TD-1391]: fix bugs in release obj in submit processing. [TD-1459]: fix compile error for release build type. [TD-225]: fix compiler error in win platform [TD-1245]: fix compile error [TD-1478]: update sim script. TEST: [TD-1389]: Update null value test [TD-1410]: add a tool for test JDBC Connector [TD-1329]: add test case for incorrect count query [TD-1478]: add test case query groupby with interval [TD-804]: add test case for metadata update