Dani Reiss , chief executive officer of Canada Goose Holdings, took his grandfather’s coat company and turned it into a luxury outerwear force by tightly controlling the brand vision and by making really warm parkas.  Now that the company is increasingly expanding beyond its core with more styles for the summer months — and seeing its business bounce back after something of a slower stretch — Reiss is still at it. “People want real things and people want functional things and people want beautiful things,” the chief executive officer told WWD after the company reported fourth-quarter sales and profit gains.…