Followup issue for https://issues.jboss.org/browse/AEROGEAR-3480

Nightly pipelines should do some basic validation of retrieved configuration for mobile clients. For now checking that the retrieved configuration is a valid JSON and check that there is an object for each bound service in services array.

Once https://issues.jboss.org/browse/AEROGEAR-7526 is finished it will be possible to do more proper validation.