wfd tests: use "wfd_presentation_URL" instead of "wfd_presentation_url"
wfd tests: use "wfd_presentation_URL" instead of "wfd_presentation_url"

The parser handles both versions but this way the test
can compare input and output strings.

UIKit0/wysiwidi,alexshalamov/wysiwidi-2,alexshalamov/wds,275288698/wds,michaelolbrich/wds,ayoubayoub/wysiwidi,275288698/wds,ayoubayoub/wysiwidi,01org/wds,ironsmile/wysiwidi,01org/wds,01org/wds,michaelolbrich/wds,ayoubayoub/wysiwidi,275288698/wds,alexshalamov/wysiwidi-2,UIKit0/wysiwidi,alexshalamov/wds,ironsmile/wysiwidi,alexshalamov/wysiwidi-2,michaelolbrich/wds,alexshalamov/wds,UIKit0/wysiwidi,ironsmile/wysiwidi