Default role for Layout Reorderer/Layout Customizer is wrong

The default containerRole for the Layout Customizer/Layout Reorderer should be Regions (based on the most common use-case for the component, and ARIA requirements), but it defaults to the generic Reorderer default of List.

The moduleLayoutHandler tries to default to regions by doing
that.options.containerRole = that.options.containerRole || fluid.roles.REGIONS;
(ModuleLayout.js, line 147) but by the time this line is executed, the containerRole has already been set to the List default, and so isn't set to Regions.