Added URLValidator test for missing scheme.
Added URLValidator test for missing scheme.

theo-l/django,pauloxnet/django,elena/django,takis/django,adamchainz/django,felixxm/django,freakboy3742/django,apollo13/django,wkschwartz/django,dsanders11/django,MarkusH/django,django/django,monetate/django,monetate/django,koordinates/django,atul-bhouraskar/django,blighj/django,apollo13/django,auvipy/django,pauloxnet/django,auvipy/django,auvipy/django,theo-l/django,monetate/django,koordinates/django,rsalmaso/django,freakboy3742/django,wkschwartz/django,ghickman/django,felixxm/django,atul-bhouraskar/django,manhhomienbienthuy/django,adamchainz/django,takis/django,solarissmoke/django,ghickman/django,elena/django,felixxm/django,rsalmaso/django,shaib/django,koordinates/django,ghickman/django,googleinterns/django,atul-bhouraskar/django,wkschwartz/django,dsanders11/django,rsalmaso/django,takis/django,adamchainz/django,pauloxnet/django,solarissmoke/django,shaib/django,takis/django,theo-l/django,django/django,rsalmaso/django,felixxm/django,solarissmoke/django,dsanders11/django,pauloxnet/django,manhhomienbienthuy/django,monetate/django,apollo13/django,solarissmoke/django,blighj/django,MarkusH/django,blighj/django,freakboy3742/django,manhhomienbienthuy/django,shaib/django,django/django,elena/django,blighj/django,koordinates/django,django/django,wkschwartz/django,elena/django,MarkusH/django,MarkusH/django,googleinterns/django,dsanders11/django,atul-bhouraskar/django,shaib/django,adamchainz/django,auvipy/django,theo-l/django,manhhomienbienthuy/django,apollo13/django,googleinterns/django,ghickman/django,googleinterns/django