CacheSizeExceededException attachment tempfile leak

If I set the attachment-max-size option for my endpoint, a
CacheSizeExceededException is thrown if the attachment size exceeds the
configured value.
In this case the attachment tempfile is not deleted by the CXF runtime, when
I close the AttachmentDataSource InputStream.

Analyzing the issue I noticed that 2 tempfiles are created (I have only 1
attachment), 2 AttachmentDataSource's can be retreived, but closing both of
them deletes only one of the tempfiles.