Reformat N2VC to standardized format

Change-Id: I7bfc2236cd5f059dc1b659e9fb746fef619124b8
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/n2vc/n2vc_conn.py b/n2vc/n2vc_conn.py
index bfdf460..6b0df89 100644
--- a/n2vc/n2vc_conn.py
+++ b/n2vc/n2vc_conn.py
@@ -294,14 +294,12 @@
     # TODO
     @abc.abstractmethod
     async def remove_relation(self):
-        """
-        """
+        """ """
 
     # TODO
     @abc.abstractmethod
     async def deregister_execution_environments(self):
-        """
-        """
+        """ """
 
     @abc.abstractmethod
     async def delete_namespace(
@@ -464,7 +462,9 @@
                         the_table, the_filter, the_path, update_dict, vca_id=vca_id
                     )
                 else:
-                    self.on_update_db(the_table, the_filter, the_path, update_dict, vca_id=vca_id)
+                    self.on_update_db(
+                        the_table, the_filter, the_path, update_dict, vca_id=vca_id
+                    )
 
         except DbException as e:
             if e.http_code == HTTPStatus.NOT_FOUND: