fixed transcription is not received when call is terminated (#1259)

* fixed transcription is not received when call is terminated

* wip

* fixed failing testcases

* wip

* wip

* wip

* wip

* should not do gracefulshutdown on stopAmd

lib/tasks/gather.js

@@ -844,6 +844,10 @@ class TaskGather extends SttTask {
   }
 
   _onTranscription(cs, ep, evt, fsEvent) {
+    // check if we are in graceful shutdown mode
+    if (ep.gracefulShutdownResolver) {
+      ep.gracefulShutdownResolver();
+    }
     // make sure this is not a transcript from answering machine detection
     const bugname = fsEvent.getHeader('media-bugname');
     const finished = fsEvent.getHeader('transcription-session-finished');
@@ -1092,7 +1096,8 @@ class TaskGather extends SttTask {
     if (this.canFallback) {
       ep.stopTranscription({
         vendor: this.vendor,
-        bugname: this.bugname
+        bugname: this.bugname,
+        gracefulShutdown: false
       })
         .catch((err) => this.logger.error({err}, `Error stopping transcription for primary vendor ${this.vendor}`));
       try {