[mapdb] Fix deserialization of values in mapDB database (#8758)

Signed-off-by: Kai Kreuzer <kai@openhab.org>

bundles/org.openhab.persistence.mapdb/pom.xml

@@ -14,6 +14,10 @@
 
   <name>openHAB Add-ons :: Bundles :: Persistence Service :: MapDB</name>
 
+  <properties>
+    <bnd.importpackage>org.openhab.core.library.types</bnd.importpackage>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.mapdb</groupId>

bundles/org.openhab.persistence.mapdb/src/main/java/org/openhab/persistence/mapdb/internal/MapDbPersistenceService.java

@@ -102,7 +102,6 @@ public class MapDbPersistenceService implements QueryablePersistenceService {
         if (db != null) {
             db.close();
         }
-        threadPool.shutdown();
     }
 
     @Override