client connection blocks in sync_connect

[huebl]

We open a new client connection with sync_connect and use a wrong url. The application blocks. We expect the sync_connect function to exit with an error.

		// set secure channel configuration
		SessionServiceConfig sessionServiceConfig;
		sessionServiceConfig.secureChannelClient_->endpointUrl(endpointUrl_);
		sessionServiceConfig.secureChannelClient_->cryptoManager(cryptoManager_);
		sessionServiceConfig.session_->sessionName("BDRInlayClient");

		// create session
		sessionService_ = serviceSetManager_.sessionService(sessionServiceConfig);
		if (!sessionService_) {
			Log(Error, "create session service error")
				.parameter("EndpointUrl", endpointUrl_);
			return false;
		}

		// open connection to opc ua server
		if (sessionService_->syncConnect() != Success) {
			Log(Error, "open connection to opc ua server error")
				.parameter("EndpointUrl", endpointUrl_);
			return false;
		}