Add a script for testing upgrades.
Review Request #2500 — Created July 28, 2011 and submitted
Add a script for testing upgrades. This introduces a new script, ./contrib/internal/test-upgrade.py, which will test upgrading Review Board installs. It can be given a list of branch or tag names, and will install a brand new installation using the first version, and then perform an upgrade on every subsequent version. By default, this will use sqlite as the database, but it takes --database-type, --database-name, --database-user, and --database-password parameters in order to test with other databases. This also updates prepare-dev to take the same parameters, plus --no-db and --no-media.
Ran this several times on sqlite and MySQL, with various combinations of versions. I went through every major version and point release from 1.0 to 1.6rc2 without problems.