Fix BICField and IBANField fields (avoid using SubfieldBase)
Fix BICField and IBANField fields (avoid using SubfieldBase)

lsaffre/lino-cosi,khchine5/lino-cosi,lsaffre/lino-cosi,lsaffre/lino-cosi,khchine5/lino-cosi,khchine5/lino-cosi