Add missing limit-container-width class to container registry

It seems that the container registry is lacking one global class: limit-container-width

This makes the container registry expand til 1280px ( minus margins and padding) instead of sticking to the pajama value of 990px;

This can be achieved by adding:

- @content_class = "limit-container-width" unless fluid_layout in

• app/views/groups/registry/repositories/index.html.haml
• app/views/projects/registry/repositories/index.html.haml