[follow-up] Use full binary path when invoking ip

Patch [1] fixed invoking of ip command in
one script but forgot to fix on another place
in another script.

This patch is follow-up path and fix the same
issue in those script.

[1] https://review.opendev.org/c/openstack/kolla/+/906516

Change-Id: I5e41a550e438fb3e4008a9e6b8df35c4775c5c30

Author: keuko

docker/letsencrypt/letsencrypt-lego/sync-and-update-certificate.sh

@@ -65,7 +65,7 @@ if [ "${INTERNAL_SET}" = "true" ] || [ "${EXTERNAL_SET}" = "true" ]; then
         server=$(echo $i | awk -F ':' '{print $1}')
         port=$(echo $i | awk -F ':' '{print $2}')
 
-        if ! ip a | grep -q "${server}"; then
+        if ! /usr/sbin/ip a | grep -q "${server}"; then
 
             log_info "[${FQDN} - hook] Rsync lego data /etc/letsencrypt/lego/ to server ${server} and port ${port}"
             rsync -a -e "ssh -p ${port} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o IdentityFile=/var/lib/letsencrypt/.ssh/id_rsa" /etc/letsencrypt/lego/ haproxy@${server}:/etc/letsencrypt/lego/ --delete >/dev/null 2>&1