Use dhcpcd for SUSE 16 diskless

SLES 16 ships no ISC dhclient and nothing provides dhcp-client, so the
image could not be built from SLES media at all. Leap carries dhcpcd
too, so one client covers both. el10 made the same move when RHEL
dropped dhclient.

confluent_osdeploy/suse16-diskless/initramfs/var/lib/dracut/hooks/cmdline/10-confluentdiskless.sh

@@ -218,7 +218,7 @@ fi
 autoconfigmethod=$(grep ipv4_method /etc/confluent/confluent.deploycfg |awk '{print $2}')
 if [ "$autoconfigmethod" = "dhcp" ]; then
     echo -n "Attempting to use dhcp to bring up $ifname..."
-    dhclient $ifname
+    dhcpcd $ifname
     echo "Complete:"
     ip addr show dev $ifname
     printf '\n[ipv4]\nmethod=auto\n' >> $nmcfg

imgutil/suse16/dracut/install

@@ -8,7 +8,7 @@ dracut_install modprobe touch echo cut wc bash uniq grep ip hostname
 dracut_install awk egrep dirname expr sort
 dracut_install ssh sshd reboot parted mkfs mkfs.ext4 mkfs.xfs xfs_db mkswap
 dracut_install efibootmgr uuidgen
-dracut_install du df ssh-keygen scp clear dhclient
+dracut_install du df ssh-keygen scp clear dhcpcd
 dracut_install /lib64/libnss_dns.so.2  # glibc dropped the versioned name
 dracut_install /lib64/libnss_compat*
 dracut_install /usr/lib64/libnl-3.so.200

imgutil/suse16/pkglist

@@ -7,7 +7,9 @@ tuned
 xfsprogs
 e2fsprogs
 chrony timezone net-tools rsync tar util-linux python3 tar dracut ethtool parted openssl bash rpm iputils lvm2 efibootmgr attr
-dhcp-client
+dhcpcd
+# dhcp-client used to pull this in; the diskless hook needs ip regardless
+iproute2
 zypper
 libfuse2
 openssh