Need to setup production oriented values for metadata params

[Alexander Ignatov]

Upstream fixes for https://bugs.launchpad.net/neutron/+bug/1274536 and for https://bugs.launchpad.net/neutron/+bug/1274536 introduced two new configuration parameters:
'metadata_workers' and 'metadata_backlog'.
We need to setup these parameters to production oriented values in MOS.

[Alexander Ignatov (aignatov)]

Per Alex Shaposhnikov comment:
'metadata_workers' - setup it in fuel to some reasonable value, ex. one per 100 planning vm’s
metadata_backlog - set it in fuel to 2048

[Timur Nurlygayanov (tnurlygayanov)]

need to add configuration to
https://github.com/stackforge/fuel-library/blob/d79efae699fef036dcc6fe6a3fa7cf7d68d60355/deployment/puppet/neutron/manifests/agents/metadata.pp

'DEFAULT/metadata_workers': value => min($::processorcount + 0, 50 + 0);
'DEFAULT/metadata_backlog': value => 2048;

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/104346

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/104346
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=941c51acfe7dfec6e7925df9f60c2f66ce3f7537
Submitter: Jenkins
Branch: master

commit 941c51acfe7dfec6e7925df9f60c2f66ce3f7537
Author: TimurNurlygayanov <email address hidden>
Date: Thu Jul 3 01:02:31 2014 +0400

    Added new parameters for Neutron agents

    Upstream fixes for Neutron introduced two new configuration
    parameters: 'metadata_workers' and 'metadata_backlog'.

    We need to setup these parameters to production oriented values.

    Change-Id: I2a23bd75c9acfeebb82d6921874dec33eb0b192b
    Closes-Bug: #1336810