infra/image/dockerfile/c10s: Fix client part deployment for the server

The client part deployment fails in the configuration of NIS. The command
/usr/bin/nisdomainname is failing in a container in this task as the
container is not privileged.

The hostnamectl-wrapper is copied from the freeipa-container container
project to replace /usr/bin/nisdomainname in the container.

infra/image/utils/hostnamectl-wrapper

@@ -0,0 +1,12 @@
+#!/bin/bash -eu
+
+if setpriv --dump | grep -q sys_admin ; then
+	if [[ "$( basename $0 )" =~ "domainname" ]] ; then
+		/usr/bin/hostname -y "$@"
+	else
+		$0.orig "$@"
+	fi
+else
+	echo "Skipping invocation of $0 $@ in unprivileged container." >&2
+	exit
+fi