Reorganize methods as per design document.

mayan/apps/documents/api_views.py

@@ -404,5 +404,5 @@ class APIDocumentVersionRevertView(generics.GenericAPIView):
     serializer_class = DocumentVersionRevertSerializer
 
     def post(self, *args, **kwargs):
-        self.get_object().revert()
+        self.get_object().revert(_user=self.request.user)
         return Response(status=status.HTTP_200_OK)

mayan/apps/documents/views.py

@@ -1164,7 +1164,7 @@ def document_version_revert(request, document_version_pk):
 
     if request.method == 'POST':
         try:
-            document_version.revert(user=request.user)
+            document_version.revert(_user=request.user)
             messages.success(request, _('Document version reverted successfully'))
         except Exception as exception:
             messages.error(request, _('Error reverting document version; %s') % exception)