pep8 - new line at end of file

Closes #796

Signed-off-by: Tomaz Muraus <tomaz@tomaz.me>

libcloud/loadbalancer/drivers/elb.py

@@ -355,4 +355,4 @@ def _create_list_params(self, params, items, label):
     def _ex_connection_class_kwargs(self):
         kwargs = super(ElasticLBDriver, self)._ex_connection_class_kwargs()
         kwargs['signature_version'] = self.signature_version
-        return kwargs
+        return kwargs