When an update operation is executed, like,
$> tacker --debug vim-update --description "test" VIM0
Exception will happen by calling this method by a non admin user.
...
tacker.api.v1.resource return (attribute_name in
target[attributes.ATTRIBUTES_TO_UPDATE] and
tacker.api.v1.resource KeyError: 'attributes_to_update'
...
Change-Id: I35d5173e9c5c25c7d544e9909da1fbcec931e6b5
Closes-Bug: #1676074