fixup! Make sure host appears in PXE ARP tables

Author: ydirson

conftest.py

@@ -334,7 +334,7 @@ def iso_remaster(answerfile):
 After=network-online.target
 [Service]
 Type=oneshot
-ExecStart=/bin/sh -c 'while ! ping -c1 {PXE_CONFIG_SERVER}; do : ; done'
+ExecStart=/bin/sh -c 'while ! ping -c1 {PXE_CONFIG_SERVER}; do sleep 1 ; done'
 [Install]
 WantedBy=default.target
 EOF