[schema sync] Update repo._type_source_cache when renaming an entity (closes #2094470) When an entity type is renamed as part of a migration, it leaves stale entries in repo._type_source_cache, which makes subsequent operations on those entities fail (they look for the old entity name instead of the new one).

bgcolor = '#000000'
stylesheets = ['%s/cubicweb.css' % datadir_url]
logo = '%s/logo.png' % datadir_url
lazy = lazystr('%(bgcolor)s')