New module: manage Citrix Netscaler service configuration (network/netscaler/netscaler_service) (#25129)

* netscaler_service initial implementation

* Changes as requested by reviewers

* Skip some tests if under python2.6 and importing requests library

* Change option "operation" to "state"

* Remove print statements from netscaler module utils

* Catch all exceptions during login

* Fix fail message

* Add common option save_config

test/units/modules/network/netscaler/netscaler_module.py

@@ -0,0 +1,69 @@
+import sys
+
+from ansible.compat.tests.mock import patch, Mock
+from ansible.compat.tests import unittest
+from ansible.module_utils import basic
+import json
+from ansible.module_utils._text import to_bytes
+
+base_modules_mock = Mock()
+nitro_service_mock = Mock()
+nitro_exception_mock = Mock()
+
+
+base_modules_to_mock = {
+    'nssrc': base_modules_mock,
+    'nssrc.com': base_modules_mock,
+    'nssrc.com.citrix': base_modules_mock,
+    'nssrc.com.citrix.netscaler': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.resource': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.resource.config': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.exception': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.exception.nitro_exception': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.exception.nitro_exception.nitro_exception': nitro_exception_mock,
+    'nssrc.com.citrix.netscaler.nitro.service': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.service.nitro_service': base_modules_mock,
+    'nssrc.com.citrix.netscaler.nitro.service.nitro_service.nitro_service': nitro_service_mock,
+}
+
+nitro_base_patcher = patch.dict(sys.modules, base_modules_to_mock)
+
+
+def set_module_args(args):
+    args = json.dumps({'ANSIBLE_MODULE_ARGS': args})
+    basic._ANSIBLE_ARGS = to_bytes(args)
+
+
+class AnsibleExitJson(Exception):
+    pass
+
+
+class AnsibleFailJson(Exception):
+    pass
+
+
+class TestModule(unittest.TestCase):
+    def failed(self):
+        def fail_json(*args, **kwargs):
+            kwargs['failed'] = True
+            raise AnsibleFailJson(kwargs)
+
+        with patch.object(basic.AnsibleModule, 'fail_json', fail_json):
+            with self.assertRaises(AnsibleFailJson) as exc:
+                self.module.main()
+
+        result = exc.exception.args[0]
+        self.assertTrue(result['failed'], result)
+        return result
+
+    def exited(self, changed=False):
+        def exit_json(*args, **kwargs):
+            raise AnsibleExitJson(kwargs)
+
+        with patch.object(basic.AnsibleModule, 'exit_json', exit_json):
+            with self.assertRaises(AnsibleExitJson) as exc:
+                self.module.main()
+
+        result = exc.exception.args[0]
+        return result