Add Enterprise SONiC "dhcp_relay" resource module (#131)

* Add Enterprise SONiC "dhcp_relay" resource module

* Update sonic_dhcp_relay.py

* Update delete all handling

* Address review comments

plugins/module_utils/network/sonic/argspec/dhcp_relay/dhcp_relay.py

@@ -0,0 +1,94 @@
+#
+# -*- coding: utf-8 -*-
+# Copyright 2022 Dell Inc. or its subsidiaries. All Rights Reserved
+# GNU General Public License v3.0+
+# (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+#############################################
+#                WARNING                    #
+#############################################
+#
+# This file is auto generated by the resource
+#   module builder playbook.
+#
+# Do not edit this file manually.
+#
+# Changes to this file will be over written
+#   by the resource module builder.
+#
+# Changes should be made in the model used to
+#   generate this file or in the resource module
+#   builder template.
+#
+#############################################
+
+"""
+The arg spec for the sonic_dhcp_relay module
+"""
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+class Dhcp_relayArgs(object):  # pylint: disable=R0903
+    """The arg spec for the sonic_dhcp_relay module
+    """
+
+    def __init__(self, **kwargs):
+        pass
+
+    argument_spec = {
+        'config': {
+            'elements': 'dict',
+            'options': {
+                'ipv4': {
+                    'options': {
+                        'circuit_id': {
+                            'choices': ['%h:%p', '%i', '%p'],
+                            'type': 'str'
+                        },
+                        'link_select': {'type': 'bool'},
+                        'max_hop_count': {'type': 'int'},
+                        'policy_action': {
+                            'choices': ['append', 'discard', 'replace'],
+                            'type': 'str'
+                        },
+                        'server_addresses': {
+                            'elements': 'dict',
+                            'options': {
+                                'address': {'type': 'str'}
+                            },
+                            'type': 'list'
+                        },
+                        'source_interface': {'type': 'str'},
+                        'vrf_name': {'type': 'str'},
+                        'vrf_select': {'type': 'bool'}
+                    },
+                    'type': 'dict'
+                },
+                'ipv6': {
+                    'options': {
+                        'max_hop_count': {'type': 'int'},
+                        'server_addresses': {
+                            'elements': 'dict',
+                            'options': {
+                                'address': {'type': 'str'}
+                            },
+                            'type': 'list'
+                        },
+                        'source_interface': {'type': 'str'},
+                        'vrf_name': {'type': 'str'},
+                        'vrf_select': {'type': 'bool'}
+                    },
+                    'type': 'dict'
+                },
+                'name': {'required': True, 'type': 'str'}
+            },
+            'type': 'list'
+        },
+        'state': {
+            'choices': ['merged', 'deleted'],
+            'default': 'merged',
+            'type': 'str'
+        }
+    }  # pylint: disable=C0301

plugins/module_utils/network/sonic/argspec/facts/facts.py

@@ -45,7 +45,8 @@ def __init__(self, **kwargs):
         'radius_server',
         'static_routes',
         'ntp',
-        'logging'
+        'logging',
+        'dhcp_relay'
     ]
 
     argument_spec = {