Added the logic to de-activate subscriptions on client close

parser/src/main/java/org/dna/mqtt/moquette/messaging/spi/impl/SubscriptionsStore.java

@@ -134,6 +134,19 @@ public class SubscriptionsStore {
                 child.removeClientSubscriptions(clientID);
             }
         }
+
+        void disconnect(String clientID) {
+            for (Subscription s : m_subscriptions) {
+                if (s.clientId.equals(clientID)) {
+                    s.setActive(false);
+                }
+            }
+
+            //go deep
+            for (TreeNode child : m_children) {
+                child.disconnect(clientID);
+            }
+        }
     }
 
     protected static class Token {
@@ -293,6 +306,10 @@ public class SubscriptionsStore {
         m_persistent.remove(clientID);
     }
 
+    public void disconnect(String clientID) {
+        subscriptions.disconnect(clientID);
+    }
+
     public List<Subscription> matches(String topic) {
         List<Token> tokens = new ArrayList<Token>();
         try {