Merge pull request #281 from praveenkumar/geniso

OCPBUGS-26046: Replace genisoimage with xorriso in 4.15 to allow rhel9 bump

Author: openshift-merge-bot[bot]

Dockerfile.rhel7

@@ -7,7 +7,7 @@ RUN go build -o machine-controller-manager ./cmd/manager
 
 FROM registry.ci.openshift.org/ocp/4.16:base
 RUN INSTALL_PKGS=" \
-      libvirt-libs openssh-clients genisoimage \
+      libvirt-libs openssh-clients xorriso \
       " && \
     yum install -y $INSTALL_PKGS && \
     rpm -V $INSTALL_PKGS && \