Node attribute ntp.servers in nodeattrib ca now be used in stateless images
modified: confluent_osdeploy/el7-diskless/profiles/default/scripts/onboot.sh
modified: confluent_osdeploy/el8-diskless/profiles/default/scripts/onboot.sh
modified: confluent_osdeploy/el9-diskless/profiles/default/scripts/onboot.sh