Fixed intermittent test failure.

Depending on how python serialized out the query string (order
dependent), this would fail. This properly splits on the `?` so we only
parse the qs.

Otherwise, this was the result of this line:
`{'http://example.com/application/2/?state': ['abc'], 'code': ['fd553921a322fdc809a689b698c4f543d46dfee7']}`