restore/backup fuel plugins

[Baboune]

Hi,

If using fuel plugins like VPNaaaS or lbaaas, on a backup/restore operation the plugins are not backed up and restored.

Use case to reproduce:
- Install Fuel controller from ISO
- Create environment with 1 controller and 2 computes
- Create backup (dockerctl backup)
- Wipe out the Fuel controller
- Reinstall Fuel controller from ISO
- Restore fuel controller (dockerctl restore)

Fuel will restore the information on the environment, the nodes, etc. But the plugins will be missing and searches like:
- yum search kernel
Will fail due to lbaas repomd,xml being absent.

As such, the plugins are not re-installed or restored, and adding a node to the existing environment might fail as a result.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209802

[Michael Polenchuk (mpolenchuk)]

Once the above commit is merged it will be possible to backup/restore plugins stuff with following command:
# dockerctl backup --full

[Michael Polenchuk (mpolenchuk)]

And also plugins will be in place w/o "--full" option (i.e. by default)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209802
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=825264f28af54c942e59291c71fce88107d9e322
Submitter: Jenkins
Branch: master

commit 825264f28af54c942e59291c71fce88107d9e322
Author: Michael Polenchuk <email address hidden>
Date: Thu Aug 6 10:48:16 2015 +0300

    Add plugins dir to backup snapshot

    - add plugins dir to backup by default.
    - mend full backup of system dirs in order to include puppet
      and repos as well.

    Closes-Bug: #1462439
    Change-Id: Id8327a283c26574088db33e89bdaaa6c7a5e2d41

[Vladimir Khlyunev (vkhlyunev)]

Verified with separate-service plugins
ISO 287