Use constants to define caching timeouts #2603
Use constants to define caching timeouts #2603

Use constants on top of the file as suggested in CR comment.

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