os-apply-config doesn't preserve permissions and ownership

[Tomas Sedovic]

It's sometimes necessary for a config file to have specific owner or permissions (e.g. Horizon's .secret_key_store has to be 600 and owned by horizon).

If the file already exists (e.g. because it was created in install.d), os-apply-config should preserve its permission and ownership. Righ now always sets it to 644 and root.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/54708

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/54708
Committed: http://github.com/openstack/os-apply-config/commit/086b6b155125c1da9a802a73b596b7fc13ba49c2
Submitter: Jenkins
Branch: master

commit 086b6b155125c1da9a802a73b596b7fc13ba49c2
Author: Tomas Sedovic <email address hidden>
Date: Thu Oct 31 11:26:10 2013 +0100

    Respect the preset permissions of config files

    It's sometimes desirable to specify the permissions or ownership of the
    generated config file instead of setting the default 644 root:root.

    If the file is already present, os-apply-config will just update the
    contents and leave everything else alone.

    Closes-Bug: #1246266
    Change-Id: Idd41ec276dd04f517760c1dbd97c75e376840b41