refactor(bootstrap): nest network fields under system.network to match main project schema

roles/configuration/tasks/locales.yml

@@ -31,7 +31,7 @@
 
     - name: Set hostname
       vars:
-        configuration_dns_domain: "{{ (system_cfg.dns.search | default([]) | first | default('')) | string }}"
+        configuration_dns_domain: "{{ (system_cfg.network.dns.search | default([]) | first | default('')) | string }}"
         configuration_hostname_fqdn: >-
           {{
             hostname
@@ -49,7 +49,7 @@
 
     - name: Add host entry to /etc/hosts
       vars:
-        configuration_dns_domain: "{{ (system_cfg.dns.search | default([]) | first | default('')) | string }}"
+        configuration_dns_domain: "{{ (system_cfg.network.dns.search | default([]) | first | default('')) | string }}"
         configuration_hostname_fqdn: >-
           {{
             hostname
@@ -65,8 +65,8 @@
           {{ [configuration_hostname_fqdn, configuration_hostname_short] | unique | join(' ') }}
         configuration_hosts_ip: >-
           {{
-            system_cfg.ip
-            if system_cfg.ip is defined and (system_cfg.ip | string | length) > 0
+            system_cfg.network.ip
+            if system_cfg.network.ip is defined and (system_cfg.network.ip | string | length) > 0
             else inventory_hostname
           }}
         configuration_hosts_line: >-