Issue #106: (WIP) Keep response receivers for *live* signal enforceme…

…nt until evicted by cache.

This makes it possible to receive multiple responses for the same correlation ID in order to mitigate an invalid response with a subsequent valid response.

Signed-off-by: Juergen Fickel <juergen.fickel@bosch.io>

concierge/service/src/main/java/org/eclipse/ditto/concierge/service/enforcement/LiveSignalEnforcement.java

@@ -203,7 +203,7 @@ private CompletionStage<Contextual<WithDittoHeaders>> returnCommandResponseConte
         return responseReceivers.get(correlationId).thenApply(responseReceiverEntry -> {
             final Contextual<WithDittoHeaders> commandResponseContextual;
             if (responseReceiverEntry.isPresent()) {
-                responseReceivers.invalidate(correlationId);
+//                responseReceivers.invalidate(correlationId);
                 final Pair<ActorRef, AuthorizationContext> responseReceiver = responseReceiverEntry.get();
                 final CommandResponse<?> response;
                 if (liveResponse instanceof ThingQueryCommandResponse) {