eclipse-ditto#760 send create thing with response-required=false

Signed-off-by: Johannes Schneider <johannes.schneider@bosch.io>

services/connectivity/mapping/src/main/java/org/eclipse/ditto/services/connectivity/mapping/ImplicitThingCreationMessageMapper.java

@@ -165,6 +165,7 @@ private Signal<CreateThing> getCreateThingSignal(final ExternalMessage message,
         final String copyPolicyFrom = getCopyPolicyFrom(thingJson);
         final DittoHeaders dittoHeaders = message.getInternalHeaders().toBuilder()
                 .contentType(DITTO_PROTOCOL_CONTENT_TYPE)
+                .responseRequired(false)
                 .build();
         return CreateThing.of(newThing, inlinePolicyJson, copyPolicyFrom, dittoHeaders);
     }