Fixed bug around fast registration and unregistration in JDKPoller

Looks like it might be a bug in the JDK registry

Author: DavyLandman

src/main/java/engineering/swat/watch/Watcher.java

@@ -35,7 +35,6 @@ public class Watcher {
     private Watcher(WatchScope scope, Path path) {
         this.scope = scope;
         this.path = path;
-        logger.info("Constructor logger for: {} at {} level", path, scope);
     }
 
     /**

src/main/java/engineering/swat/watch/impl/JDKPoller.java

@@ -110,8 +110,9 @@ public static Closeable register(SubscriptionKey path, Consumer<List<WatchEvent<
                     @Override
                     public void close() throws IOException {
                         logger.debug("Closing watch for: {}", path);
-                        key.cancel();
-                        watchers.remove(key);
+                        if (watchers.remove(key, changesHandler)) {
+                            key.cancel();
+                        }
                     }
                 };
             })