fix(controller): reverse version output

Thanks johanneswuerbach for catching this!

Author: Matthew Fisher

controller/api/middleware.py

@@ -9,13 +9,14 @@ class VersionMiddleware:
 
     def process_request(self, request):
         # server and client version must match "x.y"
+        client_version = request.META['HTTP_X_DEIS_VERSION']
         server_version = __version__.rsplit('.', 1)[0]
         try:
-            if request.META['HTTP_X_DEIS_VERSION'] != server_version:
+            if client_version != server_version:
                 message = {
                     'error': 'Client and server versions do not match.\n' +
-                    'Client version: {}\n'.format(server_version) +
-                    'Server version: {}'.format(request.META['HTTP_X_DEIS_VERSION'])
+                    'Client version: {}\n'.format(client_version) +
+                    'Server version: {}'.format(server_version)
                 }
                 return HttpResponse(
                     json.dumps(message),