Refactored database_exist? method
Refactored database_exist? method

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