Unable to suppress InvocationInputParseException

[internetstaff]

Despite the work in #439 , we see InvocationInputParseException errors caused by client disconnects that are logged as ERROR by AbstractGraphQLHttpServlet.

We can provide our own GraphQLHttpServlet that stops this, but it seems like there should be a way to intercept and silence these?

[federicorispo]

@internetstaff Thanks for the feedback, is this bug still there? Can you provide a way to reproduce the problem?