Local keystone authentication expects user id instead of user name

[borys-cl]

This is what Openstack's keystone auth v3 expects:

{ "auth": { "identity": { "methods": ["password"], "password": { "user": { "name": "admin", "domain": { "id": "default" }, "password": "adminpwd" } } } } }

and this is what contrail's implementation expects:

{ "auth": { "identity": { "methods": ["password"], "password": { "user": { "id": "admin", "domain": { "id": "default" }, "password": "adminpwd" } } } } }