http4-client: basic auth

http4_client_basic_auth.kt

    private val lowLevelClient = OkHttp() //  ApacheClient()
    private val client = ClientFilters.BasicAuth(
            user = config.apiUser, password = config.apiPassword
    ).then(lowLevelClient)

    @PreDestroy
    fun preDestroy() {
        logger.info { "CLOSE http client" }
        lowLevelClient.close()
    }