Add missing license info in main page.
Add notice txt
Fix: Duplicate class realms in case of module builds.
Remove misleading error message.
Fix: build crashes when version file contains invalid content.
Release notes for release 1.11.2
Release 1.11.2
Prepare next development iteration.
Restructure integration tests

We have the integration tests 'as it' and

we have the verification check integration tests.

Now we restructure those two projects into one common folder.
Use getModel/persistModel
Reduce log level when logging infrastucture cannot be setup.

Log level is now warn and not error anymore. We use reasonable defaults in
case we cannot set the MavenLogger.
Integration test for verification checks in module builds.