Correct reraising of exception

when an exception was caught and rethrown, it should call 'raise'
without any arguments because it shows the place where an exception
occured initially instead of place where the exception re-raised.

Change-Id: I76bda89eb37a309a66a68f6d3dea18d51843b83c

glance/api/v2/image_data.py

@@ -115,14 +115,14 @@ class ImageDataController(object):
 
                 try:
                     image_repo.save(image, from_state='saving')
-                except exception.NotAuthenticated as e:
+                except exception.NotAuthenticated:
                     if refresher is not None:
                         # request a new token to update an image in database
                         cxt.auth_token = refresher.refresh_token()
                         image_repo = self.gateway.get_repo(req.context)
                         image_repo.save(image, from_state='saving')
                     else:
-                        raise e
+                        raise
 
                 try:
                     # release resources required for re-auth

glance/db/sqlalchemy/metadef_api/namespace.py

@@ -268,7 +268,7 @@ def delete(context, name, session):
             raise exc.MetadefIntegrityError(
                 record_type='namespace', record_name=name)
         else:
-            raise e
+            raise
 
     return namespace_rec.to_dict()
 
@@ -296,6 +296,6 @@ def delete_cascade(context, name, session):
                 raise exc.MetadefIntegrityError(
                     record_type='namespace', record_name=name)
             else:
-                raise e
+                raise
 
     return namespace_rec.to_dict()

glance/db/sqlalchemy/metadef_api/resource_type.py

@@ -102,6 +102,6 @@ def delete(context, name, session):
             raise exc.MetadefIntegrityError(
                 record_type='resource-type', record_name=name)
         else:
-            raise e
+            raise
 
     return db_rec.to_dict()