add super in poitem model
add super in poitem model

kristika/dl-module,AndreaZain/dl-module,danliris/dl-models,indriHutabalian/dl-module,kanisiusandrew/dl-models,kanisiusandrew/dl-module,danliris/dl-module,baguswidypriyono/dl-module,saidiahmad/dl-module