Dropper Hazelcast because Moquette is not designed to be clusterizable

Separated the connect/disconnect logic into ConnectHandler/DisconnectHandler

Moved the sending of CONN ACK after session creation/update

Moved the will message management inside the session class

broker/src/main/java/io/moquette/connections/IConnectionsManager.java

@@ -39,10 +39,8 @@ public interface IConnectionsManager {
 
     boolean removeConnection(ConnectionDescriptor descriptor);
 
-    ConnectionDescriptor getConnection(String clientID);
-
     /**
-     * Determines wether a MQTT client is connected to the broker.
+     * Determines weather a MQTT client is connected to the broker.
      *
      * @param clientID
      * @return