Obtain xml import url path without query param (#402)

Fixed problem evaluating WSDL files with xml imports containing relative URLs with query params. Code was incorrectly returning full uri rather than just the path and subsequently adding the path a second time. This resulted in the import not being found.

xmlschema/locations.py

@@ -57,7 +57,7 @@ def from_uri(cls, uri: str) -> 'LocationPath':
 
         parts = urlsplit(uri)
         if not parts.scheme:
-            return cls(uri)
+            return cls(parts.path)
         elif parts.scheme in DRIVE_LETTERS and len(parts.scheme) == 1:
             return LocationWindowsPath(uri)  # Eg. k:/Python/lib/....
         elif parts.scheme != 'file':