fix logger test error relating to user_field
fix logger test error relating to user_field

mrpau/kolibri,benjaoming/kolibri,learningequality/kolibri,DXCanas/kolibri,lyw07/kolibri,christianmemije/kolibri,aronasorman/kolibri,DXCanas/kolibri,rtibbles/kolibri,indirectlylit/kolibri,MingDai/kolibri,lyw07/kolibri,mrpau/kolibri,indirectlylit/kolibri,jonboiser/kolibri,benjaoming/kolibri,indirectlylit/kolibri,DXCanas/kolibri,rtibbles/kolibri,MingDai/kolibri,jayoshih/kolibri,aronasorman/kolibri,aronasorman/kolibri,rtibbles/kolibri,jonboiser/kolibri,aronasorman/kolibri,mrpau/kolibri,MingDai/kolibri,benjaoming/kolibri,jonboiser/kolibri,christianmemije/kolibri,lyw07/kolibri,rtibbles/kolibri,benjaoming/kolibri,DXCanas/kolibri,learningequality/kolibri,mrpau/kolibri,MingDai/kolibri,indirectlylit/kolibri,learningequality/kolibri,jayoshih/kolibri,christianmemije/kolibri,jayoshih/kolibri,jonboiser/kolibri,christianmemije/kolibri,lyw07/kolibri,learningequality/kolibri,jayoshih/kolibri