H&M is testing a marketplace model in two of its biggest European markets. The fast fashion company is now selling third-party footwear, apparel and accessories brands like Lee, Wrangler, Fila, Buffalo, Crocs, Eastpak, Kangol, Mitchell and Ness, Superdry and LeSpecs on its German and Swedish e-commerce sites. Housed under a section called “H&M and Friends,”…