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>
(cherry picked from commit ebfd915)

# Conflicts:
#	scripts/Dockerfile.devel

scripts/Dockerfile.devel

@@ -17,10 +17,17 @@ 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
 
+<<<<<<< HEAD
 # FIXME: Ceph does not need Apache Arrow anymore, some container images may
 # still have the repository enabled. Disabling the repository can be removed in
 # the future, see https://github.com/ceph/ceph-container/pull/1990 .
 RUN dnf config-manager --disable apache-arrow-centos || true
+=======
+# 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
+>>>>>>> ebfd915ad (build: disable ceph-iscsi repository for test-container builds too)
 
 RUN dnf -y install \
 	git \