Fix Based https://stackoverflow.com/questions/30912029/using-okhttp-client-via-okclient-on-google-app-engine-throws-a-java-lang-noclas

wrapperdOkhttp.kt

class CallWrapper(private val request: Request, private var executed: Boolean = false,
                  private var cancelled: Boolean = false) : Call {

    override fun enqueue(responseCallback: Callback?) {}

    override fun isExecuted() = executed

    override fun clone() = CallWrapper(request)

    override fun isCanceled() = cancelled

    override fun cancel() {
        cancelled = true
    }

    override fun request() = request

    override fun execute(): Response { }
}