Added extra-spec key scoping to the 3PAR drivers

[OpenStack Infra]

https://review.openstack.org/#/c/34273/
commit 78cb294b457d3cecc0d953761bfcfd0674dde118
Author: Kurt Martin <email address hidden>
Date: Sun Dec 23 16:47:58 2012 -0800

    Added extra-spec key scoping to the 3PAR drivers

    The Filter scheduler uses the extra-specs data to determine capabilities
    and back-end, and it also enforces strict checking. As a result previous
    method of setting all the 3PAR settings(cpg, snap_cpg, persona, provisioning)
    on the 3PAR volume using extra-specs on a volume type will not work with the
    default scheduler. The filter scheduler will look at these keys and fail to
    schedule deployment of the volume because no suitable back-end reports those
    capabilities.

    This fix will allow the custom keys (ie: hp3par:cpg=TEST_CPG,
    hp3par:provisioning=full,...) to be scoped, unfortunately this requires
    additional checks in the common driver to parse the keys.

    I'll update the 3PAR driver section of the OpenStack Block Storage Admin
    Guide in a follow-up patch.
    DocImpact
    Fixes: bug 1194289

    Change-Id: Id3fde3b3a185eedf2b8193fd0dc6324d904e8834

[Kurt Martin (kurt-f-martin)]

This was fixed in the following review for the Havana release with this review: https://review.openstack.org/#/c/34465/
The doc changes should *not* be backported to the Grizzly release.