Fixed issue that query parameters double url encoded in python client

[geekerzp]

No description provided.

[geekerzp]

When calling the method toPathValue on the query parameters, the query parameters will be urlencoded.
But in swagger.mustache 60 line,

if queryParams:
      # Need to remove None values, these should not be sent
      sentQueryParams = {}
      for param, value in queryParams.items():
        if value is not None:
          sentQueryParams[param] = ApiClient.sanitizeForSerialization(value)
      url = url + '?' + urllib.urlencode(sentQueryParams)

will urlencode query parameters again.
The query parameter will be double urlencoded.