Adds bigip_dns_zone module (#48482)

This module can be used to manage zones on a BIG-IP. The managed
zones should **not** be confused with ZoneRunner zones as they are
not the same.

test/units/modules/network/f5/fixtures/load_ltm_dns_zone_1.json

@@ -0,0 +1,31 @@
+{
+    "kind": "tm:ltm:dns:zone:zonestate",
+    "name": "foo",
+    "partition": "Common",
+    "fullPath": "/Common/foo",
+    "generation": 812,
+    "selfLink": "https://localhost/mgmt/tm/ltm/dns/zone/~Common~foo?ver=13.1.0.8",
+    "dnsExpressAllowNotify": [
+        "1.1.1.1"
+    ],
+    "dnsExpressEnabled": "yes",
+    "dnsExpressNotifyAction": "consume",
+    "dnsExpressNotifyTsigVerify": "yes",
+    "dnsExpressServer": "/Common/asd",
+    "dnsExpressServerReference": {
+        "link": "https://localhost/mgmt/tm/ltm/dns/nameserver/~Common~asd?ver=13.1.0.8"
+    },
+    "responsePolicy": "no",
+    "serverTsigKey": "/Common/asd",
+    "serverTsigKeyReference": {
+        "link": "https://localhost/mgmt/tm/ltm/dns/tsig-key/~Common~asd?ver=13.1.0.8"
+    },
+    "transferClients": [
+        "/Common/asd"
+    ],
+    "transferClientsReference": [
+        {
+            "link": "https://localhost/mgmt/tm/ltm/dns/nameserver/~Common~asd?ver=13.1.0.8"
+        }
+    ]
+}

test/units/modules/network/f5/test_bigip_dns_zone.py

@@ -0,0 +1,130 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright: (c) 2018, F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import json
+import sys
+
+from nose.plugins.skip import SkipTest
+if sys.version_info < (2, 7):
+    raise SkipTest("F5 Ansible modules require Python >= 2.7")
+
+from ansible.module_utils.basic import AnsibleModule
+
+try:
+    from library.modules.bigip_dns_zone import ApiParameters
+    from library.modules.bigip_dns_zone import ModuleParameters
+    from library.modules.bigip_dns_zone import ModuleManager
+    from library.modules.bigip_dns_zone import ArgumentSpec
+
+    # In Ansible 2.8, Ansible changed import paths.
+    from test.units.compat import unittest
+    from test.units.compat.mock import Mock
+    from test.units.compat.mock import patch
+
+    from test.units.modules.utils import set_module_args
+except ImportError:
+    try:
+        from ansible.modules.network.f5.bigip_dns_zone import ApiParameters
+        from ansible.modules.network.f5.bigip_dns_zone import ModuleParameters
+        from ansible.modules.network.f5.bigip_dns_zone import ModuleManager
+        from ansible.modules.network.f5.bigip_dns_zone import ArgumentSpec
+
+        # Ansible 2.8 imports
+        from units.compat import unittest
+        from units.compat.mock import Mock
+        from units.compat.mock import patch
+
+        from units.modules.utils import set_module_args
+    except ImportError:
+        raise SkipTest("F5 Ansible modules require the f5-sdk Python library")
+
+fixture_path = os.path.join(os.path.dirname(__file__), 'fixtures')
+fixture_data = {}
+
+
+def load_fixture(name):
+    path = os.path.join(fixture_path, name)
+
+    if path in fixture_data:
+        return fixture_data[path]
+
+    with open(path) as f:
+        data = f.read()
+
+    try:
+        data = json.loads(data)
+    except Exception:
+        pass
+
+    fixture_data[path] = data
+    return data
+
+
+class TestParameters(unittest.TestCase):
+    def test_module_parameters(self):
+        args = dict(
+            name='foo',
+            dns_express=dict(
+                server='server1',
+                enabled=True,
+                notify_action='consume',
+                allow_notify_from=['1.1.1.1'],
+                verify_tsig=True,
+                response_policy=False
+            ),
+            nameservers=[
+                'foo', 'bar', 'baz'
+            ],
+            tsig_server_key='key1'
+        )
+
+        p = ModuleParameters(params=args)
+        assert p.name == 'foo'
+        assert len(p.nameservers) == 3
+        assert p.tsig_server_key == '/Common/key1'
+        assert p.express_server == '/Common/server1'
+        assert p.enabled == 'yes'
+        assert p.notify_action == 'consume'
+        assert len(p.allow_notify_from) == 1
+        assert p.verify_tsig == 'yes'
+        assert p.response_policy == 'no'
+
+    def test_api_parameters(self):
+        args = load_fixture('load_ltm_dns_zone_1.json')
+        p = ApiParameters(params=args)
+        assert p.name == 'foo'
+
+
+class TestManager(unittest.TestCase):
+
+    def setUp(self):
+        self.spec = ArgumentSpec()
+
+    def test_create(self, *args):
+        # Configure the arguments that would be sent to the Ansible module
+        set_module_args(dict(
+            name='foo',
+            password='password',
+            server='localhost',
+            user='admin'
+        ))
+
+        module = AnsibleModule(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode
+        )
+        mm = ModuleManager(module=module)
+
+        # Override methods to force specific logic in the module to happen
+        mm.exists = Mock(return_value=False)
+        mm.create_on_device = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True