Invalidate property cache when an interface is removed

Summary:
As we do not know which property belongs to which interface we have to
drop the whole cache whenever one or multiples interface are removed.

Test Plan:
make
solid-hardware5 list details
solid-hardware5 listen

Reviewers: Frameworks, broulik

Reviewed By: broulik

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D12126