Force CleanListener to be registered before UploadListener

I was in a situation where CleanListener was called after the UploadListener. So, because the CleanListener test if the current file on the object is an UploadedFile, it doesn't succeed (because UplaodListener replace the UploadedFile by a "simple" File).

Thank to this PR, I force the CleanListeners to be executed before all others.

Tested and working.
No BC.