add ci param support

Author: tiedu

qcloud_cos/cos_client.py

@@ -405,6 +405,7 @@ def get_presigned_url(self, Bucket, Key, Method, Expired=300, Params={}, Headers
         """
         url = self._conf.uri(bucket=Bucket, path=Key)
         sign = self.get_auth(Method=Method, Bucket=Bucket, Key=Key, Expired=Expired, Headers=Headers, Params=Params)
+        sign = urlencode(dict([item.split('=', 1) for item in sign.split('&')]))
         url = url + '?' + sign
         if Params:
             url = url + '&' + urlencode(Params)