tests: mailer: fix tests
tests: mailer: fix tests

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