catch and return errors up to GraphQL

[hloydl]

No error message is returned, just an empty array:

[herr-vogel]

errors with recent version of graphql-java

[zerounix]

Should be as easy as implementing something like this https://github.com/graphql-java/graphql-java-servlet/blob/master/src/main/java/graphql/servlet/DefaultGraphQLErrorHandler.java

[zerounix]

@herr-vogel you or me? ;-)

[vyj7]

@zerounix @herr-vogel I would like to work on this issue if this is not fixed