integrated Selenium tests
Default config variables are moved in the main config.grovoy. They can
be overridden by the local configurations
Update Readme with info on the default configurations
Minor changes in the default configuration variables
Merge branch 'DDBNEXT-32' into develop
added test for valid search hit
Merge branch 'develop' of https://github.com/Deutsche-Digitale-Bibliothek/ddb-next into DDBNEXT-12
Merge branch 'DDBNEXT-12' into develop
Merge branch 'develop' into DDBNEXT-25