Ensure 'name' property update allowed for OS::Nova::Server

[huangtianhua]

1. create a stack which has a nova server, the server named server-A
2. stack-update to update the name of the server, the new name is server-B
3. then heat post a create server request to nova, and a new server has been created , although heat delete the old server.
4. I think it's a bug, I just want to update the name of the server-A, not create a new one
5. The season is because the 'name' property not update allowed on OS::Nova::Server
6. So we should ensure 'name' property update allowed for OS::Nova::Server

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/74624

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/74624
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=09da49e76682ad64831d9555b21b111eb802c90e
Submitter: Jenkins
Branch: master

commit 09da49e76682ad64831d9555b21b111eb802c90e
Author: huangtianhua <email address hidden>
Date: Wed Feb 12 17:41:25 2014 +0800

    Allow Server name property to be updated

    The patch will ensure the 'name' property updatable for the resource
    OS::Nova::Server.

    Change-Id: Iaf8569fc739b2e5f9b5011ecdd57af25f7b1f57d
    Closes-Bug: #1279239