So far, the repository of the instance to be migrated needs to be created manually and pushed to git.
Improve the tests, so both the old and new webapps' version numbers are configurable from the POM.

Steps of the integration test:

1. run the old webapp
2. copy the created repository to new webapp and run it (triggers the update)
3. run the another new webapp (install without update)
4. run comparison on new webapps