Changelog for python3-keystonemiddleware-4.21.0-2.fc30.noarch.rpm :

* Wed Oct 31 2018 Miro Hrončok - 4.21.0-2- Subpackage python2-keystonemiddleware has been removed See https://fedoraproject.org/wiki/Changes/Mass_Python_2_Package_Removal
* Sun Feb 11 2018 RDO 4.21.0-1- Update to 4.21.0