Also overloading RelatedManager.__call__ in order to give us the proper manager on all relations.

Signed-off-by: Raphael Lullis <raphael@lullis.net>
merge

Signed-off-by: Raphael Lullis <raphael@lullis.net>
Platform/Software deprovisioning working

Signed-off-by: Raphael Lullis <raphael@lullis.net>