Roll Back image version to 15.4
It was requested that the node-featuer-discover version was the 15.4 version here (dsop/dccscr#2933 (closed))
Renovate decided to bump the version, Roll back to the correct version and a fix to renovate have been pushed to dev.
Also rolled back the UBI to 11.9 to match the upstream image.
MR !35 (merged)
Edited by Joseph Karpp