Add firstboot to EL

Also add 'mgt_server' rather than 'ipv4_server'. Will move to this.
The server should be able to dictate the right address without the
deploymennt image having to keep track.

confluent_osdeploy/el8/profiles/default/scripts/firstboot.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+nodename=$(grep ^NODENAME /etc/confluent/confluent.info|awk '{print $2}')
+apikey=$(cat /etc/confluent/confluent.apikey)
+mgr=$(grep mgt_server /etc/confluent/confluent.deploycfg|awk '{print $2}')
+curl --capath /etc/confluent/tls -X POST -d 'status: complete' -H "CONFLUENT_NODENAME: $nodename" -H "CONFLUENT_APIKEY: $apikey" https://$mgr/confluent-api/self/updatestatus
+systemctl disable firstboot
+rm /etc/systemd/system/firstboot.service

confluent_server/confluent/netutil.py

@@ -189,6 +189,7 @@ def get_nic_config(configmanager, node, ip=None, mac=None, ifidx=None,
             net, prefix, svrip = net
             candsrvs.append(svrip)
             cfgdata['ipv4_server'] = svrip
+            cfgdata['mgt_server'] = svrip
             for candidate in cfgbyname:
                 if cfgbyname[candidate].get('ipv4_method', None) == 'dhcp':
                     dhcprequested = True