Support disabling inactive links for Juniper

Adds the necessary code to the Juniper Junos device driver to support
disabling inactive links. This feature is enabled by setting the
per-device config flag 'ngs_disable_inactive_ports'.

Change-Id: I636613d0c910d10601422ad094f835c17a606e37
Story: 2003391
Task: 24933

networking_generic_switch/devices/netmiko_devices/juniper.py

@@ -55,6 +55,14 @@ class Juniper(netmiko_devices.NetmikoSwitch):
         'vlan members',
     )
 
+    ENABLE_PORT = (
+        'delete interface {port} disable',
+    )
+
+    DISABLE_PORT = (
+        'set interface {port} disable',
+    )
+
     PLUG_TRUNK_PORT_TO_NETWORK = (
         'set interface {port} unit 0 family ethernet-switching '
         'vlan members {segmentation_id}',

networking_generic_switch/tests/unit/netmiko/test_juniper.py

@@ -80,6 +80,19 @@ def test_plug_port_to_network(self, mock_exec):
              'set interface 3333 unit 0 family ethernet-switching '
              'vlan members 33'])
 
+    @mock.patch('networking_generic_switch.devices.netmiko_devices.'
+                'NetmikoSwitch.send_commands_to_device')
+    def test_plug_port_to_network_disable_inactive(self, m_sctd):
+        switch = self._make_switch_device(
+            {'ngs_disable_inactive_ports': 'true'})
+        switch.plug_port_to_network(3333, 33)
+        m_sctd.assert_called_with(
+            ['delete interface 3333 disable',
+             'delete interface 3333 unit 0 family ethernet-switching '
+             'vlan members',
+             'set interface 3333 unit 0 family ethernet-switching '
+             'vlan members 33'])
+
     @mock.patch('networking_generic_switch.devices.netmiko_devices.'
                 'NetmikoSwitch.send_commands_to_device')
     def test_delete_port(self, mock_exec):
@@ -88,6 +101,17 @@ def test_delete_port(self, mock_exec):
             ['delete interface 3333 unit 0 family ethernet-switching '
              'vlan members'])
 
+    @mock.patch('networking_generic_switch.devices.netmiko_devices.'
+                'NetmikoSwitch.send_commands_to_device')
+    def test_delete_port_disable_inactive(self, m_sctd):
+        switch = self._make_switch_device(
+            {'ngs_disable_inactive_ports': 'true'})
+        switch.delete_port(3333, 33)
+        m_sctd.assert_called_with(
+            ['delete interface 3333 unit 0 family ethernet-switching '
+             'vlan members',
+             'set interface 3333 disable'])
+
     def test_send_config_set(self):
         connect_mock = mock.MagicMock(netmiko.base_connection.BaseConnection)
         connect_mock.send_config_set.return_value = 'fake output'