Test SlickMigrationManager on other Slick drivers than H2

[lastland]

Right now the SlickMigrationManager is only tested on h2 database. We must test it on other Slick drivers (e.g. MySQL, Postgres) to prove it's solid.

The automatic tests that will be implemented for #7 will also need to include these tests.

Slick Drivers:

• [x] H2Driver
• [x] SQLiteDriver
• [x] MySQLDriver
• [x] PostgresDriver
• [x] HsqldbDriver
• [x] AccessDriver (will not support this since it's no long supported in Slick)
• [x] DerbyDriver

[lastland]

Resolved in 96d9d88