Fixed syntax error that caused OOM in the ambari-metrics-collector

The following code does not find a method StopHandler.

This will cause the scheduled task of calculating and uploading data with an interval of 60 seconds to fail. Here's the picture.

Ambari-2.7 does not have this problem in the first place. The problem is caused by the spin-off of the Ambari-Metrics sub-project from Ambari.

The reason is that ambari-metrics also relies on OS_check in ambari-commons. After the subproject is split, ambari-commons module is not pulled over, so the subproject ambari-metrics needs to remove the commons dependency. However, there are omissions in this process leading to incomplete adaptation.