Nova libvirt container fails to build on RHEL-8 because last dnf changes

[Sagi (Sergey) Shnaidman]

nova-libvirt, nova-compute-ironic-build containers fail to build on RHEL-8:

Error: No available modular metadata for modular package
http://logs.rdoproject.org/63/22163/8/check/periodic-tripleo-rhel-8-master-containers-build-push/b6dd564/logs/buildah-builds/kolla-hea_e58r/docker/nova/nova-libvirt/nova-libvirt-build.log.txt.gz

Related to last dnf change:
https://access.redhat.com/downloads/content/rhel---8/x86_64/7416/dnf/4.2.7-6.el8/noarch/fd431d51/package-changelog

2019-09-03 Jaroslav Mracek <email address hidden> - 4.2.7-6
    - Remove patch to not fail when installing modular RPMs without modular metadata

[Alfredo Moralejo (amoralej)]

Some time ago we uploaded the advanced virtualization packages in custom-deps repository in rhui as it was not possible to synchronize the repo using native synchronization functionality from rhui. This does not includes modules metadata, just pure RPMS. Now, as pointed in the message, dnf update does not allow to install modular rpms without modules metadata.

[Alan Pevec (apevec)]

jpena found the associated bug [1] and patch [2] that caused this:
[1] - https://bugzilla.redhat.com/show_bug.cgi?id=1743640
[2] - https://github.com/rpm-software-management/libdnf/pull/737/files

AV is still not available in RHUI cert and RHUI custom repo doesn't have an option to add modules md.
Looking at [2] one workaround could be to rebuild AV RPMs removing RPMTAG_MODULARITYLABEL in the process.

[Alan Pevec (apevec)]

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/8Base/en/Advanced-Virt/SRPMS/ are rebuilt de-modularized, tested in https://review.opendev.org/693228

[Alfredo Moralejo (amoralej)]

rhel8 build containers jobs passed in PS7. advanced virtualization rebuilds are now in https://trunk.rdoproject.org/rhel8-master/deps/latest/ and https://trunk.rdoproject.org/rhel8-train/deps/latest/ so jobs should pass now.