build: disable ceph-iscsi repository for test-container builds too

The ceph-iscsi repository seems to provide broken metadata or packages.
Ceph-CSI does not need to install them, so disable the repository for
now.

It seems that other repositories gave issues before too, but these
repositories were disabled after installing all available updates. For
ceph-iscsi updating fails already, so disable the repositories before
updating.

Updates: #2034
Signed-off-by: Niels de Vos <ndevos@ibm.com>

scripts/Dockerfile.devel

@@ -17,6 +17,11 @@ RUN source /build.env \
     && mkdir -p /usr/local/go \
     && curl https://storage.googleapis.com/golang/go${GOLANG_VERSION}.linux-${GOARCH}.tar.gz | tar xzf - -C ${GOROOT} --strip-components=1
 
+# TODO: remove the following cmd, when issue
+# https://github.com/ceph/ceph-container/issues/2034 is fixed.
+RUN dnf config-manager --disable \
+    tcmu-runner,tcmu-runner-source,tcmu-runner-noarch,ceph-iscsi || true
+
 RUN dnf -y install \
 	git \
 	make \