Merge branch 'develop' of https://github.com/Deutsche-Digitale-Bibliothek/ddb-next into develop
DDBNEXT-557: wip
DDBNEXT-557: remove unneeded classes
DDBNEXT-557: wip
DDBNEXT-557: add new domain object and test
DDBNEXT-557: Add JavaDoc and refactor tests.
DDBNEXT-557: remove unused code
DDBNEXT-557: Add license header and remove unused code.
DDBNEXT-557: add space
Merge branch 'develop' of https://github.com/Deutsche-Digitale-Bibliothek/ddb-next into develop
Merge branch 'feature/DDBNEXT-557' into develop

Conflicts:
	grails-app/conf/Config.groovy
	grails-app/controllers/de/ddb/next/UserController.groovy
	grails-app/services/de/ddb/next/ConfigurationService.groovy