Data index flyway postgresql migration scripts doesn't allow multiple executions

Currently with the data-index persistence addon flyway is also used to keep database structure updated with the changes between versions.

The data-index addon should execute the data-index db migration and also the runtimes( if it is using persistence). In order to simplify the flyway configuration and allow both flyway migrations, the proposed solution is to make the dataindex db migration scripts strong enough to be able to be executed many times and only doing changes in case they are needed (they haven't been done yet)