replace deprecated methods by the ones from KCalendarSystem
replace deprecated methods by the ones from KCalendarSystem

svn path=/trunk/kdepim/; revision=254718

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi