Add database versioning to project

[stefanleminh]

As a developer I would like to add a proper versioning tool for my databases so I can easily migrate databases in case of changes instead of doing it manually. Known tools for that are Liquibase and Flyway.

AC1: Upon push to the repository, the remote database gets updated.

DoD

• [x] Story is tested against acceptance criteria
• Unit test should be passed
• Integration test is done ( if applicable)
• [x] Non-functional requirements are met
• [x] Story ok-ed by Product Owner
• [x] Peer Code Review performed
• [x] Any configuration or build changes documented

[stefanleminh]

Documentation on liquibase has been created here.