TAJO-763: Out of range problem in utc_usec_to() (modified contributor name to Ilhyun Suh in CHANGES.txt).
TAJO-763: Out of range problem in utc_usec_to() (modified contributor name to Ilhyun Suh in CHANGES.txt).

yeeunshim/tajo_test,yeeunshim/tajo_test,yeeunshim/tajo_test,yeeunshim/tajo_test