[PATCH] tests: update for rename of CentOS8 PowerTools repo

[Daniel P . Berrangé]

This was intentionally renamed recently to be all lowercase:

https://bugs.centos.org/view.php?id=17920
https://wiki.centos.org/Manuals/ReleaseNotes/CentOS8.2011#Yum_repo_file_and_repoid_changes

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---

This needs to be merged asap, as CI will break for anyone whose branch
triggers a rebuild of the centos container image.

eg current broken git master:

  https://gitlab.com/berrange/qemu/-/jobs/915852165

vs with this fix

  https://gitlab.com/berrange/qemu/-/jobs/915862731

 tests/docker/dockerfiles/centos8.docker | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/docker/dockerfiles/centos8.docker 
b/tests/docker/dockerfiles/centos8.docker
index 54bc6d54cd..06b67962fd 100644
--- a/tests/docker/dockerfiles/centos8.docker
+++ b/tests/docker/dockerfiles/centos8.docker
@@ -31,6 +31,6 @@ ENV PACKAGES \
     zlib-devel
 
 RUN dnf install -y dnf-plugins-core && \
-  dnf config-manager --set-enabled PowerTools && \
+  dnf config-manager --set-enabled powertools && \
   dnf install -y $PACKAGES
 RUN rpm -q $PACKAGES | sort > /packages.txt
-- 
2.29.2