Description of problem:

The following fails on Fedora Rawhide (F31):

# dnf install xerces-j2
Last metadata expiration check: 0:10:39 ago on Thu 09 May 2019 04:31:46 PM UTC.
No match for argument: xerces-j2
Error: Unable to find a match

This breaks pki-ca:

Error: 
 Problem: package pki-server-10.7.0-1.fc31.noarch requires pki-tools = 10.7.0, but none of the providers can be installed
  - package pki-tools-10.7.0-1.fc31.x86_64 requires pki-base-java = 10.7.0, but none of the providers can be installed
  - package pki-ca-10.7.0-1.fc31.noarch requires pki-server = 10.7.0, but none of the providers can be installed
  - package pki-base-java-10.7.0-1.fc31.noarch requires xerces-j2, but none of the providers can be installed
  - conflicting requests
  - package xerces-j2-2.12.0-2.fc30.noarch is excluded
(try to add '--skip-broken' to skip uninstallable packages)



Please rebuild xerces-j2 for F30 and F31. Note that this package is maintained as an ursine package as per here: 

https://src.fedoraproject.org/rpms/xerces-j2/tree/master