fixes for confirm session (#663)

* fixes for confirm session

* allow empty dialconfirm array

lib/utils/constants.json

@@ -30,6 +30,7 @@
     "Transcribe": "transcribe"
   },
   "AllowedSipRecVerbs": ["config", "gather", "transcribe", "listen", "tag"],
+  "AllowedConfirmSessionVerbs": ["config", "gather", "plays", "say", "tag"],
   "CallStatus": {
     "Trying": "trying",
     "Ringing": "ringing",

lib/utils/place-outdial.js

@@ -353,6 +353,7 @@ class SingleDialer extends Emitter {
       const json = await this.requestor.request('dial:confirm', confirmHook, this.callInfo.toJSON());
       if (!json || (Array.isArray(json) && json.length === 0)) {
         this.logger.info('SingleDialer:_executeApp: no tasks returned from confirm hook');
+        this.emit('accept');
         return;
       }
       const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));