{Network} Software Load Balance 100% depth (Azure#17729)

* add command 'az network lb list-nic'

* fix test issue

* fix ci issues

* fix linter issues

src/azure-cli/azure/cli/command_modules/network/_help.py

@@ -3691,6 +3691,14 @@
     text: az network lb list -g MyResourceGroup
 """
 
+helps['network lb list-nic'] = """
+type: command
+short-summary: List associated load balancer network interfaces.
+examples:
+  - name: List associated load balancer network interfaces.
+    text: az network lb list-nic -g MyResourceGroup --name MyLb
+"""
+
 helps['network lb outbound-rule'] = """
 type: group
 short-summary: Manage outbound rules of a load balancer.
@@ -5984,6 +5992,11 @@
 short-summary: Delete a route server under a resource group.
 """
 
+helps['network routeserver wait'] = """
+type: command
+short-summary: Place the CLI in a waiting state until a condition of the route server is met.
+"""
+
 helps['network routeserver peering'] = """
 type: group
 short-summary: Manage the route server peering.
@@ -6024,6 +6037,11 @@
 short-summary: List all routes the route server bgp connection is advertising to the specified peer.
 """
 
+helps['network routeserver peering wait'] = """
+type: command
+short-summary: Place the CLI in a waiting state until a condition of the route server peering is met.
+"""
+
 helps['network watcher'] = """
 type: group
 short-summary: Manage the Azure Network Watcher.

src/azure-cli/azure/cli/command_modules/network/commands.py

@@ -877,6 +877,7 @@ def _make_singular(value):
         g.wait_command('wait')
         g.generic_update_command('update', getter_name='lb_get', getter_type=network_load_balancers_custom,
                                  setter_name='begin_create_or_update')
+        g.custom_command('list-nic', 'list_load_balancer_nic', min_api='2017-06-01')
 
     property_map = {
         'frontend_ip_configurations': 'frontend-ip',
@@ -1419,6 +1420,7 @@ def _make_singular(value):
         g.custom_command('delete', 'delete_virtual_hub', supports_no_wait=True, confirmation=True)
         g.show_command('show', 'get')
         g.custom_command('list', 'list_virtual_hub')
+        g.wait_command('wait')
 
     with self.command_group('network routeserver peering', network_virtual_hub_bgp_connection_sdk,
                             custom_command_type=network_virtual_hub_bgp_connection_update_sdk) as g:
@@ -1429,6 +1431,7 @@ def _make_singular(value):
                                  custom_func_name='update_virtual_hub_bgp_connection')
         g.custom_command('delete', 'delete_virtual_hub_bgp_connection', supports_no_wait=True, confirmation=True)
         g.show_command('show', 'get')
+        g.wait_command('wait')
 
     with self.command_group('network routeserver peering', network_virtual_hub_bgp_connections_sdk,
                             custom_command_type=network_virtual_hub_bgp_connections_update_sdk) as g:

src/azure-cli/azure/cli/command_modules/network/custom.py

@@ -3304,6 +3304,11 @@ def create_load_balancer(cmd, load_balancer_name, resource_group_name, location=
     return sdk_no_wait(no_wait, client.create_or_update, resource_group_name, deployment_name, properties)
 
 
+def list_load_balancer_nic(cmd, resource_group_name, load_balancer_name):
+    client = network_client_factory(cmd.cli_ctx).load_balancer_network_interfaces
+    return client.list(resource_group_name, load_balancer_name)
+
+
 def create_lb_inbound_nat_rule(
         cmd, resource_group_name, load_balancer_name, item_name, protocol, frontend_port,
         backend_port, frontend_ip_name=None, floating_ip=None, idle_timeout=None, enable_tcp_reset=None):