France counts a growing number of filmmakers making cool cinema and getting their films into festivals like Cannes, Berlin and the Biennale. Names such as Julia Ducournau (“Grave”), Hafsia Herzi (“Bonne Mère”) and Eva Husson come to mind, all of whom are presenting films this year at Cannes. The latter has directed her fourth film, "Mothering Sunday." Her previous work, "The Girls of the Sun," left me cold