Bad response format when PlayCollect fire OF event

[hrosa]

When PlayCollect fires OF event, it creates a response containing an error message.
This format is wrong and do not follow the standards.

For this reason, we get an exception on RestComm side (because it expects to parse the response code):

13:29:14,300 ERROR org.mobicents.servlet.restcomm.mgcp.IvrEndpoint null: java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:454) [rt.jar:1.7.0_79]
at java.lang.Integer.parseInt(Integer.java:527) [rt.jar:1.7.0_79]
at org.mobicents.servlet.restcomm.mgcp.IvrEndpoint.notification(IvrEndpoint.java:167) [restcomm.mgcp-7.6.0.873.jar:]
at org.mobicents.servlet.restcomm.mgcp.IvrEndpoint.onReceive(IvrEndpoint.java:125) [restcomm.mgcp-7.6.0.873.jar:]
at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:159) [akka-actor_2.10-2.1.2.jar:]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425) [akka-actor_2.10-2.1.2.jar:]
at akka.actor.ActorCell.invoke(ActorCell.scala:386) [akka-actor_2.10-2.1.2.jar:]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230) [akka-actor_2.10-2.1.2.jar:]
at akka.dispatch.Mailbox.run(Mailbox.scala:212) [akka-actor_2.10-2.1.2.jar:]
at akka.dispatch.ForkJoinExecutorConfigurator$MailboxExecutionTask.exec(AbstractDispatcher.scala:506) [akka-actor_2.10-2.1.2.jar:]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:262) [scala-library-2.10.1.jar:]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975) [scala-library-2.10.1.jar:]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1478) [scala-library-2.10.1.jar:]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104) [scala-library-2.10.1.jar:]