Obtain xml import url path without query param

[bpierce-gaig]

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.

[brunato]

Thank you for the contribute, I merge this despite the error.

Unfortunately this seems to be more complicated because the URL can be encoded or not, so I will add other fixes in location module.

[brunato]

I've done a new bugfix release (v3.3.1) after the merge. The result is a more clear LocationPath code in from_uri() and as_uri() methods and a normalize_url() that encode the URL in any case using a new helper function.

It should still works with the import of xml in your WSDL files.

[bpierce-gaig]

Tested and it looks good. Thanks!