Fix agelimitreport duplicate 'S'-agelimit

Two issues:
1) There are 64 programs which don't have an age limit. They've (probably all) come thru the XML-interface from YLE. These are now reported as 'Ei tiedossa'.
2) There is one program where the program->classification mapping table meku_audiovassification_c contains duplicate rows. This is dealt with in the import (and will be manually fixed in existing db's).