Clearing all test events after each test

Author: vamossagar12

fluss-server/src/test/java/org/apache/fluss/server/coordinator/event/watcher/TableChangeWatcherTest.java

@@ -106,6 +106,7 @@ void after() {
         if (tableChangeWatcher != null) {
             tableChangeWatcher.stop();
         }
+        eventManager.clearEvents();
     }
 
     @Test