process-svg-quarkus-addon does not send proper json

[mingfang]

https://github.com/kiegroup/kogito-runtimes/blob/741a14640fa11f2ee1d21104ab3e47df8bec4831/addons/process-svg/process-svg-quarkus-addon/src/main/java/org/kie/kogito/svg/dataindex/QuarkusDataIndexClient.java#L82

here is the fix

    public List<NodeInstance> getNodeInstancesFromProcessInstance(String processInstanceId) {
        String query = getNodeInstancesQuery(processInstanceId);
        CompletableFuture<List<NodeInstance>> cf = new CompletableFuture<>();
        HttpRequest<Buffer> request = client.post("/graphql").putHeader("Authorization", getToken());
        request.sendJsonObject(JsonObject.mapFrom(singletonMap("query", query)), result -> {
            if (result.succeeded() && result.result().statusCode() == 200) {
                cf.complete(getNodeInstancesFromResponse(result.result().bodyAsJsonObject()));
            } else {
                cf.completeExceptionally(result.cause());
            }
        });
        try {
            return cf.get();
        } catch (Exception e) {
            throw new ProcessSVGException("Exception while trying to get data from Data Index service", e);
        }
    }

[mingfang]

It turns out sendJson() and sendJsonObject() do exactly the same thing.