changed to skip converting empty easy_access_id of OpenPNE2 database (refs #2040)
changed to skip converting empty easy_access_id of OpenPNE2 database (refs #2040)

openpne/OpenPNE3,openpne/OpenPNE3,C-nakajima/OpenPNE3,ShinichiU/AuthFramework,ShinichiU/AuthFramework,tejima/OP3PKG,kashiwasan/symfony-advanced,ShinichiU/OpenPNE3,C-nakajima/OpenPNE3,ShinichiU/OpenPNE3,openpne/OpenPNE3,upsilon/travis-test,isaosano/OpenPNE3,upsilon/travis-test,nise-nabe/ppcon-sns,ShinichiU/OpenPNE3,C-nakajima/OpenPNE3,isaosano/OpenPNE3,ShinichiU/AuthFramework,nise-nabe/ppcon-sns,nishizoe/OpenPNE3,ShinichiU/OpenPNE3,nishizoe/OpenPNE3,isaosano/OpenPNE3,openpne/OpenPNE3,tejima/OP3PKG,C-nakajima/OpenPNE3,kashiwasan/symfony-advanced,isaosano/OpenPNE3