Fixing broken tests #2126

- KMS
- S3
- CloudFormation (Thanks kgutwin!)

tests/test_s3/test_server.py

@@ -15,6 +15,7 @@ class AuthenticatedClient(FlaskClient):
     def open(self, *args, **kwargs):
         kwargs['headers'] = kwargs.get('headers', {})
         kwargs['headers']['Authorization'] = "Any authorization header"
+        kwargs['content_length'] = 0    # Fixes content-length complaints.
         return super(AuthenticatedClient, self).open(*args, **kwargs)