Description of problem:

delorean-deps.repo file points into two Delorean repos and to CentOS 'kvm-common' one. The problem is that the last one points to /centos/ so works only on x86-64.

CentOS 7.5 has 'kvm-common' synced for alternate archs so it can be used. It also introduced new YUM variable for it: $contentdir.

Changed repo definition:

[rdo-qemu-ev]
name=RDO CentOS-$releasever - QEMU EV
baseurl=http://mirror.centos.org/$contentdir/7/virt/$basearch/kvm-common/
gpgcheck=0
enabled=1
skip_if_unavailable=1

This way I can simplify code of Kolla project to just use it directly and not have to answer users asking "why I have 404 each time I do package installation".