http://cloud.centos.org/altarch/7/images/aarch64/CentOS-7-aarch64-GenericCloud.qcow2.xz
EOF
-xz --decompress ${1:-/home/opnfv/functest/images}/CentOS-7-aarch64-GenericCloud.qcow2.xz
+xz --decompress --force ${1:-/home/opnfv/functest/images}/CentOS-7-aarch64-GenericCloud.qcow2.xz
exit $?