Currently, it's enforced in devstack through setting encoding in
connection URI. It would be beneficial if oslo.db handles that on its
own, so that we can
- remove those connection arguments from devstack;
- more importantly, not rely on users to set it in all affected
projects.
Oursql and MySQLdb also require use_unicode=0 to avoid performance drop.
Change-Id: I676c9c5e418905160e4ab647b8a0f2fb601e8962
Closes-Bug: 1340779