Stub notify_permissions_change in vis test
Stub notify_permissions_change in vis test

It's actually not necessary to have this method run in order to check
permissions of a visualization

UCL-ShippingGroup/cartodb-1,dbirchak/cartodb,codeandtheory/cartodb,splashblot/dronedb,raquel-ucl/cartodb,nyimbi/cartodb,future-analytics/cartodb,thorncp/cartodb,raquel-ucl/cartodb,thorncp/cartodb,codeandtheory/cartodb,bloomberg/cartodb,nuxcode/cartodb,DigitalCoder/cartodb,UCL-ShippingGroup/cartodb-1,dbirchak/cartodb,UCL-ShippingGroup/cartodb-1,splashblot/dronedb,codeandtheory/cartodb,thorncp/cartodb,nuxcode/cartodb,thorncp/cartodb,nuxcode/cartodb,thorncp/cartodb,nuxcode/cartodb,bloomberg/cartodb,raquel-ucl/cartodb,codeandtheory/cartodb,raquel-ucl/cartodb,future-analytics/cartodb,CartoDB/cartodb,bloomberg/cartodb,dbirchak/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,dbirchak/cartodb,splashblot/dronedb,future-analytics/cartodb,CartoDB/cartodb,CartoDB/cartodb,nyimbi/cartodb,UCL-ShippingGroup/cartodb-1,CartoDB/cartodb,DigitalCoder/cartodb,bloomberg/cartodb,splashblot/dronedb,nuxcode/cartodb,nyimbi/cartodb,dbirchak/cartodb,nyimbi/cartodb,raquel-ucl/cartodb,future-analytics/cartodb,codeandtheory/cartodb,CartoDB/cartodb,DigitalCoder/cartodb,DigitalCoder/cartodb,nyimbi/cartodb,splashblot/dronedb,UCL-ShippingGroup/cartodb-1,bloomberg/cartodb