keystoneclient `user-get` unable to handle usernames containing utf-8 characters

Issue

Because user-get is supposed to handle fetching a user by id or by name the first thing it tries to do is fetch a user by ID. When this name is UTF-8 this fails because there is no support for fetching objects by id with utf-8 (because there will never be a utf-8 id number).

The client needs to compensate for this by first percent encoding the name before it attempts to do a get by id.

test string:

keystone user-get ñew