WOH analyze-tracks & WOH failing cause exceptions when shutting down Opencast

Steps to reproduce:
1. Have a look at the log file on the admin node when shutting down Opencast

Actual Results:
2016-11-07 18:06:42,697 | ERROR | (?:?) - [org.opencastproject.workflow.handler.workflow.AnalyzeTracksWorkflowOperationHandler(65)] deactivate method [deactivate] not found; Component will fail
2016-11-07 18:06:42,705 | ERROR | (?:?) - [org.opencastproject.workflow.handler.workflow.FailingWorkflowOperationHandler(73)] deactivate method [deactivate] not found; Component will fail

Expected Results:
No exception should occur

Workaround (if any):
Just ignore since shutdown anyway