Comment 10 for bug 1535224

Ohk got confirmation on https://bugs.launchpad.net/nova/+bug/1538011 - comment#14

"Augustina Ragwitz (auggy) wrote on 2016-02-29:
Per discussion, current fix strategy is to casefold in sqlalchemy/api.py and force keys to all lower case."

I will share patch same way for this bug...

Thanks!!