Since the default database collation has changed, include an upgrade
playbook to ensure that existing tables and databases with the previous
collation are converted during upgrades from Mitaka.
Change-Id: Iadbcf50c9611561b56fa1ea6ef3e80f636e0c0a8
Depends-on: I8507b6c9bd058bb308cc089f3802e52e24bea324