Minecolonies version

Version: minecolonies-0.10.552-BETA-universal
Minecraft: 1.14.4
Forge 28.1.90

Expected behavior

• The dedicated server shuts down normally, when closed with the stop command

Actual behaviour

• When shutting down the dedicated server, the jvm doesn't close.
  I think the problem is, that the ThreadPoolExecutor for pathfinding

  minecolonies/src/main/java/com/minecolonies/coremod/entity/pathfinding/Pathfinding.java

  Line 29 in 3c1e5ae

  private static final ThreadPoolExecutor executor;

  
  never gets shut down when closing the server, because the created threads are non-daemon threads.

Steps to reproduce the problem

1. Start a dedicated server
2. Play a bit, so villagers use pathfinding
3. Stop the server with the stop command
4. The jvm never closes

Verification

1. Add a simple ThreadFactory to the ThreadPoolExecutor:

private static class DebugThreadFactory implements ThreadFactory {
        private ThreadFactory defaultFactory;
        
        public DebugThreadFactory() {
            this.defaultFactory = Executors.defaultThreadFactory();
        }
        
        @Override
        public Thread newThread(Runnable r) {
            Thread t = this.defaultFactory.newThread(r);
            t.setName("minecolonies-pathfinding-" + t.getName());
            return t;
        }
        
    }

2. Get a thread dump after stoping the server. See that there is only one non-deamon thread running, which is the minecolonies-pathfinding thread.

you're welcome to make a PR to fix said issue if you're capable enough to find it