Use parent Call.Factory of OkHttpClient to be able to use OpenTelemetry - #1590

  private Call.Factory createTracedClient(OpenTelemetry openTelemetry, @Nonnull final IAuthenticationProvider auth) {
        return OkHttpTelemetry.builder(openTelemetry).build().newCallFactory(createClient(auth));
    }

  private OkHttpClient createClient(@Nonnull final IAuthenticationProvider auth) {
        return HttpClients.createDefault(auth);
    }

// then create the GraphServiceClient
IAuthenticationProvider authenticationProvider = requestUrl -> cf;
GraphServiceClient
                .builder(Call.Factory.class, Request.class)
                .httpClient(createTracedClient(openTelemetry, authenticationProvider))
                .authenticationProvider(authenticationProvider)
                .buildClient();