generate and update climate config sample with oslo config tools

[Swann Croiset]

We need to have a consistent config file sample with all available options
and to have validation to not miss new option added

[Dina Belova (dbelova)]

https://review.openstack.org/#/c/71243/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/71243
Committed: https://git.openstack.org/cgit/stackforge/climate/commit/?id=e9d03ee1ea57b3bdf7e50b7b2f55fd36ca6f19d9
Submitter: Jenkins
Branch: master

commit e9d03ee1ea57b3bdf7e50b7b2f55fd36ca6f19d9
Author: Swann Croiset <email address hidden>
Date: Thu Jan 23 11:28:02 2014 +0100

    Reworking configuration options

    Use config tools from Oslo-incubator :

    * generate a consistant config file sample:
      etc/climate/climate.conf.sample

    * Add a new check in tox env 'pep8' to check out-dated config file sample.

    Move specifics options for admin credential in group config 'physical:host'

    Factorize by declaring config options in each plugins with available values and
    centralizing RESOURCE_TYPE value in plugin's module (one dir per plugin)

    Use socket.gethostname() in place of socket.getfqdn() to have
    predictable default value for 'host' config in climate.config,
    since it's ugly forced in openstack.common.config.generator#L232

    Fixes: bug #1271875

    Change-Id: Ie54fc98b58b49400360c4fd2ce7d8bb3b75915e2