@Override
    public void stop() {
        super.stop();
        ServerSessionEventDispatcher.removeListener(this);
    }
A SoftwareServerVersionManager is the main responsible for sending query to remote entity and 
Obtain software information from the remote entity server using XEP-0092 .
@author Manasse Ngudia manasse@mnsuccess.com
xmppserver/src/main/java/org/jivesoftware/openfire/session/SoftwareServerVersionManager.java