fs-watcher: Fixed fs-watcher multiple onChange callback

Change-Id: Ied8c876e4fee238c960e091466e275823e83e899
diff --git a/fs-watcher/fs-watcher.cc b/fs-watcher/fs-watcher.cc
index 06e849f..2c83f09 100644
--- a/fs-watcher/fs-watcher.cc
+++ b/fs-watcher/fs-watcher.cc
@@ -124,9 +124,10 @@
       m_watcher->removePath (absFilePath);
       m_watcher->addPath (absFilePath);
 
-      Scheduler::scheduleOneTimeTask (m_scheduler, 0.5,
+      Scheduler::scheduleDelayOneTimeTask (m_scheduler, 0.5,
                                       bind (m_onChange, triggeredFile.relative_path ()),
                                       triggeredFile.relative_path ().string());
+
     }
   else
     {