Close wrapped value after each iteration in MapSegmentIteration

src/main/java/net/openhft/chronicle/hash/impl/stage/iter/HashSegmentIteration.java

@@ -137,6 +137,7 @@ public abstract class HashSegmentIteration<K, E extends HashEntry<K>>
                                 break;
                         }
                     } finally {
+                        hookAfterEachIteration();
                         // if doReplaceValue() -> relocation() -> alloc() -> nextTier()
                         // was called, restore the tier we were iterating over
                         if (s.tier != currentTier) {
@@ -170,6 +171,9 @@ public abstract class HashSegmentIteration<K, E extends HashEntry<K>>
         return interrupted;
     }
 
+    public void hookAfterEachIteration() {
+    }
+
     @Override
     public void forEachSegmentEntry(Consumer<? super E> action) {
         forEachSegmentEntryWhile(e -> {