Feat 1179 race issue with play verb (#1183)

* Fixed race issue between queueCommand false and queueCommand true when play task is involved

https://github.com/jambonz/jambonz-feature-server/issues/1179

* removed unnecessary emitter

* added destroy mechanism for stickyEventEmitter

* clearing stickyEventEmitter

* memory leak fix

lib/tasks/task.js

@@ -19,6 +19,7 @@ class Task extends Emitter {
     this.data = data;
     this.actionHook = this.data.actionHook;
     this.id = data.id;
+    this.taskId = this.name + '-' + uuidv4();
 
     this._killInProgress = false;
     this._completionPromise = new Promise((resolve) => this._completionResolver = resolve);