vCenter 5.1 SSO Database

vCenter 5.1 introduces the new Single Sign On (SSO) service with its own database requirement.
The creation of this database is manual outside of the installer.  A great .sql script for this was posted by @vDerekS here.

I then encountered another error "Error 29115: Cannot authenticate to DB."

The solution was to toggle DB->Properties->Security to "SQL Server and Windows Authentication mode:

and re-run the upgrade.

Happy 5.1 upgrading!