[Erlang server] Crashing on JSON requests

[velzevur]

Description

When processing application/json requests if the incoming json is invalid in any way - the request crashes.

Swagger-codegen version

master

Swagger declaration file content or url

If this jsx:decode call fails:

prepare_body(Body) ->
    case Body of
        <<"">> -> <<"">>;
        _ -> jsx:decode(Body, [return_maps])
    end.

the jsx throws an error. It is unhandled and crashes the request.

Related issues/PRs

PR fix is comming right after this issue