Update CatalogController generator template

[cjcolvar]

The CatalogController generator template is old and out of sync with the one that Blacklight provides. It is missing a needed change which causes facet limits and more facets links to be broken (https://github.com/projectblacklight/blacklight/blob/master/lib/generators/blacklight/templates/catalog_controller.rb#L78). We could avoid getting out of sync in the future by injecting the needed Hydra lines into the one Blacklight provides instead of supplying a whole template ourselves.