Fixed Regression: Non-trivial server context path for REST request was ignored

A non-trivial server context path, e.g. ‘/customContextPrefix’ was not working anymore with REST requests. That regression was now fixed.

(CMS-27931)

Exception handling by DataFetcherExceptionResolverAdapter

To resolve exceptions to GraphQL errors, a DataFetcherExceptionResolverAdapter has been added which resolves implementations of RuntimeException to ErrorType.DataFetchingError. Specific exceptions and corresponding ErrorTypes can be configured via configuration property caas.exceptionErrorMap. Exceptions are resolved via configuration for the most specific super class.

(CMS-27811)