network: fix errors

circle/network/forms.py

@@ -106,7 +106,7 @@ class HostForm(ModelForm):
                 'ipv4',
                 'ipv6',
                 'shared_ip',
-                'pub_ipv4',
+                'external_ipv4',
             ),
             Fieldset(
                 'Information',

circle/network/tables.py

@@ -44,7 +44,7 @@ class HostTable(Table):
         model = Host
         attrs = {'class': 'table table-striped table-condensed'}
         fields = ('hostname', 'vlan', 'mac', 'ipv4', 'ipv6',
-                  'pub_ipv4', 'created_at', 'owner', )
+                  'external_ipv4', 'created_at', 'owner', )
         order_by = ('vlan', 'hostname', )