Previously the cache was only updated once on startup, because the graph
code only check for filesystems on startup. However this breaks the API as it
was supposed and so unit tests.
Fixes#13142
Signed-off-by: Jörg Thalheim <joerg@higgsboson.tk>
Upstream-commit: 2cb23527e4f3f74a9fb98ddc7c0c11c50c3f07d2
Component: engine