Change the package content_loader is imported from
Change the package content_loader is imported from

Updates the app __init__.py file to import the content_loader from the
new dmcontent package instead of dmutils.

alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend