Move CartoDB::Resque::Metrics to CartoDB::ResqueMetrics
Move CartoDB::Resque::Metrics to CartoDB::ResqueMetrics

This way we don't overwrite the existing Resque namespace with
CartoDB::Resque

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