Changing deletion policy update resource

[Thomas Herve]

Updating the deletion policy updates the whole resource, which can lead to a delete/create, which seems unnecessary most of the time. It can lead to some stupid behavior when setting the deletion policy to Retain on a volume, as updating the stack deletes and recreates the volume.

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/92145

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/92145
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=65e068557df1d8d7ce04f7dbd37ef0f83a9bfe26
Submitter: Jenkins
Branch: master

commit 65e068557df1d8d7ce04f7dbd37ef0f83a9bfe26
Author: Thomas Herve <email address hidden>
Date: Mon May 5 17:37:56 2014 +0200

    Remove update_allowed_keys definition and usage

    The update_allowed_keys attribute didn't really define any useful
    policy, and prevented automatic update which should be handled by the
    base Resource class like DeletionPolicy. This patch removes the usage
    and the various definitions around the code base.

    Change-Id: I78494aba07b6badeca8e95f1875ca8e4b9b0290c
    Co-Authored-By: <email address hidden>
    Partial-Bug: #1316171

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/94615

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/94615
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=84640e7a7a6b563778a324ac99994cc0d4cb6871
Submitter: Jenkins
Branch: master

commit 84640e7a7a6b563778a324ac99994cc0d4cb6871
Author: Thomas Herve <email address hidden>
Date: Wed May 21 15:18:32 2014 +0200

    Only raise UpdateReplace when properties change

    This changes the default behavior of Resource.handle_update to only
    raise UpdateReplace if the properties are different. It allows updating
    DeletionPolicy cleanly without deleting the resource.

    Co-Authored-By: <email address hidden>
    Closes-Bug: #1316171
    Change-Id: I1d2864dc44ff7a5b4536b26f2dba525e01e56af0