Persistence connection for cnos_vlan (#42500)

* Changing Lenovo Inc to Lenovo and update License file to be consistent.

* Changing cnos_vlan from paramiko to persistence connection of Ansible. Also talking care of CLI changes in CNOS commands with backward compatibility.

* Fixing Validation issues

* Trailing lines removal

* Review comments of Gundalow are getting addressed. He mentioned only at one place for cnos.py. But I have covered the entire file.

* Changes to incorporate Review comments from Qalthos

* Removing configure terminal command from module code

* Aligning with change in run_cnos_commands method changes

* Editing cliconf for latest CNOS CLIs

test/units/modules/network/cnos/fixtures/cnos_vlan_config.cfg

@@ -0,0 +1,21 @@
+VLAN     Name                             Status  IPMC FLOOD Ports
+======== ================================ ======= ========== ===================
+1        default                          ACTIVE  IPv6
+                                                             Ethernet1/2(u)
+                                                             Ethernet1/3(t)
+                                                             Ethernet1/4(t)
+                                                             Ethernet1/9(u)
+                                                             Ethernet1/10(u)
+                                                             Ethernet1/14(u)
+                                                             Ethernet1/15(u)
+                                                             Ethernet1/16(u)
+                                                             Ethernet1/17(u)
+13       anil                             ACTIVE  IPv4,IPv6
+                                                             po13(t)
+                                                             po17(t)
+                                                             po100(t)
+                                                             po1003(t)
+                                                             po1004(t)
+                                                             Ethernet1/3(t)
+                                                             Ethernet1/4(t)
+

test/units/modules/network/cnos/test_cnos_vlan.py

@@ -0,0 +1,47 @@
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import json
+from ansible.compat.tests.mock import patch
+from ansible.modules.network.cnos import cnos_vlan
+from units.modules.utils import set_module_args
+from .cnos_module import TestCnosModule, load_fixture
+
+
+class TestCnosVlanModule(TestCnosModule):
+
+    module = cnos_vlan
+
+    def setUp(self):
+        super(TestCnosVlanModule, self).setUp()
+
+        self.mock_run_cnos_commands = patch('ansible.module_utils.network.cnos.cnos.run_cnos_commands')
+        self.run_cnos_commands = self.mock_run_cnos_commands.start()
+
+    def tearDown(self):
+        super(TestCnosVlanModule, self).tearDown()
+        self.mock_run_cnos_commands.stop()
+
+    def load_fixtures(self, commands=None, transport='cli'):
+        self.run_cnos_commands.return_value = [load_fixture('cnos_vlan_config.cfg')]
+
+    def test_cnos_vlan_create(self):
+        set_module_args({'username': 'admin', 'password': 'pass',
+                         'host': '10.241.107.39', 'deviceType': 'g8272_cnos',
+                         'outputfile': 'test.log', 'vlanArg1': '13',
+                         'vlanArg2': 'name', 'vlanArg3': 'anil'})
+        result = self.execute_module(changed=True)
+        file = open('Anil.txt', "a")
+        file.write(str(result))
+        file.close()
+        expected_result = 'VLAN configuration is accomplished'
+        self.assertEqual(result['msg'], expected_result)
+
+    def test_cnos_vlan_state(self):
+        set_module_args({'username': 'admin', 'password': 'pass',
+                         'host': '10.241.107.39', 'deviceType': 'g8272_cnos',
+                         'outputfile': 'test.log', 'vlanArg1': '13',
+                         'vlanArg2': 'state', 'vlanArg3': 'active'})
+        result = self.execute_module(changed=True)
+        expected_result = 'VLAN configuration is accomplished'
+        self.assertEqual(result['msg'], expected_result)