Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/25887

Log:
commit d5bbfad3d06e8801d70f4efce84c9504519efbc3
Author: gengjh <gengjh at cn.ibm.com>
Date:   Mon Apr 1 22:11:50 2013 +0800

    Enhance the validation of the quotas update
    
    Need check whether the already used and reserved exceeds the new quota
    before update it.
    
    DocImpact
    Implements a validation to validate whether already used and reserved
    quota exceeds the new quota when run 'nova quota-update', it will throw
    error if the quota exceeds. This check will be ignored if admin want to
    force update when run 'nova quota-update' with additional option
    '--force'.
    This validation help admin to be aware of whether the quotas are
    oversold when they try to update quota and also provide an option
    '--force' to allow admin force update the quotas.
    
    Fix bug 1160749
    
    Change-Id: Iba3cee0f0d92cf2e6d64bc83830b0091992d1ee9