v3 endpoint set command always need service option

[wanghong]

This is a bug, I can not only set other property. For example:
openstack endpoint set fe210c4ab6a74ab7978c3b900eb64f70 --region xx --os-identity-api-version 3 --debug --os-token admin --os-url http://127.0.0.1:35357/v3/

ERROR: openstackclient.shell Traceback (most recent call last):
  File "/opt/stack/python-openstackclient/openstackclient/shell.py", line 173, in run
    return super(OpenStackShell, self).run(argv)
  File "/usr/local/lib/python2.7/dist-packages/cliff/app.py", line 217, in run
    result = self.run_subcommand(remainder)
  File "/usr/local/lib/python2.7/dist-packages/cliff/app.py", line 282, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/local/lib/python2.7/dist-packages/cliff/command.py", line 50, in run
    self.take_action(parsed_args)
  File "/opt/stack/python-openstackclient/openstackclient/identity/v3/endpoint.py", line 184, in take_action
    service = common.find_service(identity_client, parsed_args.service)
  File "/opt/stack/python-openstackclient/openstackclient/identity/common.py", line 29, in find_service
    return utils.find_resource(identity_client.services, name_type_or_id)
  File "/opt/stack/python-openstackclient/openstackclient/common/utils.py", line 33, in find_resource
    if isinstance(name_or_id, int) or name_or_id.isdigit():
AttributeError: 'NoneType' object has no attribute 'isdigit'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/111137

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/111137
Committed: https://git.openstack.org/cgit/openstack/python-openstackclient/commit/?id=a9fb5fa102560d389a8a9f76ed572f1c4fc9944b
Submitter: Jenkins
Branch: master

commit a9fb5fa102560d389a8a9f76ed572f1c4fc9944b
Author: wanghong <email address hidden>
Date: Tue Jul 29 15:33:18 2014 +0800

    v3 endpoint set shouldn't always need service option

    Change-Id: I71aab1ee4f467dc963e7afa7fc1c82b4255ea822
    Closes-Bug: #1351121