In Change-Id I6d7c1bf49a8eaf3d8e50fb12888bf3d5b46b6c55 we fixed the
filesystem code to assume the self._tlv memper is a reference to a
class, and not an instance (as this is what the majority of the code
did).
However, it seems thre wer two instances where we actually had _tlv
reference an instance. Change that to class so it's the same all over
the code base.
Change-Id: Ie4878ad6a92feafe47e375c4f5f3f198921e1e95
6551627cb8