MT#56321 DSM: Finishing the DSM playback, support: 486, 487 and 603

We have to add more SIP response codes, which will be checked against
the isDSMPlaybackFinished(). So that when the DSM playback is finished,
the call is properly released on the caller's side.

Exceptionally 487 is added, for cases like:
a call to HG, where nobody answers and the timeout triggers
a cancelation of all the legs.

Change-Id: I1f7cf81dd5966843713fc41c21ea0249174c13ab

core/AmB2BSession.cpp

@@ -365,8 +365,16 @@ void AmB2BSession::onB2BEvent(B2BEvent* ev)
             }
           }
 
-        /* 480 - processing of the playback completion from DSM applications */
-        } else if (reply_ev->reply.code == 480 && dlg->getStatus() == AmSipDialog::Connected) {
+        /* Processing of the playback completion from DSM applications
+         * For now we only support: 480 Unavailable and 486 Busy/603 Decline.
+         * Exceptionally 487 is added, for cases like:
+         * a call to HG, where nobody answers and the timeout triggers a cancelation of all the legs.
+         */
+        } else if ((reply_ev->reply.code == 480 ||
+                    reply_ev->reply.code == 486 ||
+                    reply_ev->reply.code == 487 ||
+                    reply_ev->reply.code == 603)
+                    && dlg->getStatus() == AmSipDialog::Connected) {
 
           /* TT#188800, if this is a completion of the playback of one of the DSM applications,
             (office hours, play last caller, pre announce, early dbprompt)