Comment 6 for bug 1230229

Reviewed: https://review.openstack.org/65688
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=c3dad3f0625172d9ca41605787c0ccef82d60c5f
Submitter: Jenkins
Branch: master

commit c3dad3f0625172d9ca41605787c0ccef82d60c5f
Author: Thomas Spatzier <email address hidden>
Date: Thu Jan 9 14:15:09 2014 +0100

    Enable better sub-classing of common Schema class

    This patch is first in a series of patches to unify the code for
    property and parameter validation based on a common Schema class.

    The current patch refactors the existing Schema class in
    constraints.py so it will in a subsequent patch be easier to
    sub-class it, i.e. to rebase the parameters schema class on it.

    For example, sub-classes will be able to override uppercase/
    lowercase spelling of data type names etc., which will save us
    translation between CFN and HOT specifics in the engine.

    Change-Id: I0418a00f045af590b17500716a74b8cc6ff72409
    Partial-Bug: #1230229
    Implements: blueprint schema-code-consolidation