wcs: use MIDDLEWARE instead of MIDDLEWARE_CLASSES (#41375)

roles/app-setup/templates/wcs-settings.j2

@@ -8,15 +8,15 @@ TEMPLATES[0]['OPTIONS']['context_processors'] = [
         'hobo.context_processors.theme_base',
         ] + TEMPLATES[0]['OPTIONS']['context_processors']
 
-if not 'MIDDLEWARE_CLASSES' in globals():
-    MIDDLEWARE_CLASSES = global_settings.MIDDLEWARE_CLASSES
+if not 'MIDDLEWARE' in globals():
+    MIDDLEWARE = global_settings.MIDDLEWARE
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
     'hobo.middleware.utils.StoreRequestMiddleware',
     'hobo.middleware.xforwardedfor.XForwardedForMiddleware',
     'hobo.middleware.VersionMiddleware', # /__version__
     'hobo.middleware.cors.CORSMiddleware',
-) + MIDDLEWARE_CLASSES
+) + MIDDLEWARE
 
 CACHES = {
     'default': {