Implement basic functionalities for workflow control.
- Manage join/leave of clients
- All clients communicate via socket.io
- Probes emit events
- Managers register workflows (by using a workflow essence)
- Send kickstart request to Managers to launch workflows
- Route events to workflow runs
- Queue events to not lose events between workflow tasks
- Fixed some issues found while working on testcases
- Set to perform coverage and unittest and generate outputs to files

Change-Id: I678723edc20df9247d63a4bf6380785ab8b2b221
diff --git a/src/config/config.js b/src/config/config.js
new file mode 100644
index 0000000..288e184
--- /dev/null
+++ b/src/config/config.js
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+(function () {
+    'use strict';
+  
+    const argv = require('yargs').argv;
+    const path = require('path');
+    const YamlConfig = require('node-yaml-config');
+    const logger = require('../config/logger.js');
+  
+    // if a config file is specified in as a CLI arguments use that one
+    const cfgFile = argv.config || 'config.yml';
+  
+    let config;
+    try {
+        logger.log('debug', `Loading ${path.join(__dirname, cfgFile)}`);
+        config = YamlConfig.load(path.join(__dirname, cfgFile));
+        logger.log('debug', `Parsed config: ${JSON.stringify(config)}`);
+    }
+    catch(e) {
+        logger.log('debug', `No ${cfgFile} found, using default params`);
+    }
+  
+    module.exports = {
+        service: {
+            port: (config && config.service) ? config.service.port : 3000
+        }
+    };
+})();
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