Create new databases with appropriate collation
Summary: Ref T1191. We don't create new databases with appropriate collation yet.
Created a new database and saw it issue:
>>>  <query> CREATE DATABASE IF NOT EXISTS `phabricator2_testo` COLLATE utf8mb4_bin
Reviewers: btrahan, hach-que
Reviewed By: hach-que
Maniphest Tasks: T1191
Differential Revision: https://secure.phabricator.com/D10632