log shutdown reason of persistence actor

Signed-off-by: Yannic Klem <yannic.klem@bosch.io>

internal/utils/persistent-actors/src/main/java/org/eclipse/ditto/internal/utils/persistentactors/AbstractPersistenceActor.java

@@ -619,7 +619,7 @@ private void notAccessible(final WithDittoHeaders withDittoHeaders) {
     }
 
     private void shutdown(final String shutdownLogTemplate, final I entityId) {
-        log.debug(shutdownLogTemplate, String.valueOf(entityId));
+        log.info(shutdownLogTemplate, String.valueOf(entityId));
         passivate();
     }