Shorten entity field names (entity change!)
Refactor PersistableAccessToken and use shorter names (entity change!)
Shorten OAuth2Authentication field names (entity change!)
PersistableAccessToken: use String for RefreshToken
Remove AutoRegisteredConverter

It's not used since Java-based configuration.
Remove unused ValueFormatterMessageInterpolatorFactoryBean
Allow to use replica sets
Travis, don't run on oraclejdk8