How to update Region to have the same case sensitive names

Issue

• By checking endpoint-list, it shows different cases for the region name even though it supposed to be the same
• It might be caused while doing some operations/tests, but want to make them to have the same region name

$ keystone endpoint-list | grep -i regionOne | awk '{print $4}'
RegionOne
RegionOne
regionOne
regionOne
RegionOne
RegionOne
regionOne