Limit for maximum number of credentials introduced

Until now, authenticated users (incl. free plan users) could create as much credential entries as they wanted. This unfortunately posed a security risk of getting the DB flooded by high numbers of device credentials.

With the current release Bosch IoT Device Management introduces a limit of maximum 10 credentials per device.

Find all known limits at https://docs.bosch-iot-suite.com/device-management/Restrictions-related-to-the-device-connectivity-layer.html.