“How cruel men are.” Or so says Queen Elizabeth I in the period drama “Mary Queen of Scots.” Yes, even in 16th-century England, it’s boys drool, girls rule.Starring a pair of 2018 Oscar nominees in Margot Robbie (“I, Tonya”) and Saoirse Ronan (“Lady Bird”), the movie pits Robbie’s raven-haired, alabaster-skinned Elizabeth against her rival monarch and first cousin, Ronan’s Mary Stuart, in a scrum for the [...]