Disable per-user rate limiting by default

[OpenStack Infra]

https://review.openstack.org/34821
commit 0d9d2a3ab3348e13694877d87144a2f3a500c080
Author: Joe Gordon <email address hidden>
Date: Thu Jun 27 16:03:01 2013 -0700

    Disable per-user rate limiting by default

    The rate limiting enabled via api_rate_limit, is per user rate limiting
    which does not protect against intentional DOS, instead DOS rate
    limiting should be elsewhere. Furthermore useful values for this are very deployment
    specific.

    * Private deployments simply don't need it.
    * Public deployments need something more sophisticated (queue depth based,
      not static values).
    * Folks that do want it as belt-and-braces want semi-decent defaults
      but there is no need to default it on.

    Part of more sane defaults effort.

    DocImpact

    Change-Id: I5451f6f90a6448c838612f180f0af750213a62bf

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/42188

[Andreas Jaeger (jaegerandi)]

Tom will fix this with https://review.openstack.org/41624/

[Andreas Jaeger (jaegerandi)]

Fixed with https://review.openstack.org/#/c/41624/