Add dns_publish_fixed_ip attribute to subnets

With the subnet_dns_publish_fixed_ip extension Neutron has added a new
attribute to subnets, allowing to select whether DNS records should be
published for fixed IPs from that subnet. Add support for this when
creating and updating subnets.

[0] https://bugs.launchpad.net/neutron/+bug/1784879
[1] https://review.opendev.org/662405
[2] https://review.opendev.org/662409

Depends-On: https://review.opendev.org/679833
Change-Id: Ia804e878acfd1f05e1f00c2ac9202c1d260827f4

Author: jharbott

openstackclient/network/v2/subnet.py

@@ -229,6 +229,10 @@ def _get_attrs(client_manager, parsed_args, is_create=True):
         attrs['enable_dhcp'] = True
     if parsed_args.no_dhcp:
         attrs['enable_dhcp'] = False
+    if parsed_args.dns_publish_fixed_ip:
+        attrs['dns_publish_fixed_ip'] = True
+    if parsed_args.no_dns_publish_fixed_ip:
+        attrs['dns_publish_fixed_ip'] = False
     if ('dns_nameservers' in parsed_args and
        parsed_args.dns_nameservers is not None):
         attrs['dns_nameservers'] = parsed_args.dns_nameservers
@@ -302,6 +306,17 @@ def get_parser(self, prog_name):
             action='store_true',
             help=_("Disable DHCP")
         )
+        dns_publish_fixed_ip_group = parser.add_mutually_exclusive_group()
+        dns_publish_fixed_ip_group.add_argument(
+            '--dns-publish-fixed-ip',
+            action='store_true',
+            help=_("Enable publishing fixed IPs in DNS")
+        )
+        dns_publish_fixed_ip_group.add_argument(
+            '--no-dns-publish-fixed-ip',
+            action='store_true',
+            help=_("Disable publishing fixed IPs in DNS (default)")
+        )
         parser.add_argument(
             '--gateway',
             metavar='<gateway>',
@@ -557,6 +572,17 @@ def get_parser(self, prog_name):
             action='store_true',
             help=_("Disable DHCP")
         )
+        dns_publish_fixed_ip_group = parser.add_mutually_exclusive_group()
+        dns_publish_fixed_ip_group.add_argument(
+            '--dns-publish-fixed-ip',
+            action='store_true',
+            help=_("Enable publishing fixed IPs in DNS")
+        )
+        dns_publish_fixed_ip_group.add_argument(
+            '--no-dns-publish-fixed-ip',
+            action='store_true',
+            help=_("Disable publishing fixed IPs in DNS")
+        )
         parser.add_argument(
             '--gateway',
             metavar='<gateway>',