Add tests to cover policy_bandwidth_limit_rule

This patch set adds tests to cover the policy_bandwidth_limit_rule API [0].
Test creates, showes, updates and deletes policy_bandwidth_limit_rule.
Part of "Increase Neutron RBAC Coverage" initiative [1]

[0] https://developer.openstack.org/api-ref/network/v2/index.html#qos-minimum-bandwidth-rules
[1] https://storyboard.openstack.org/#!/story/2002641

Change-Id: I0f4b61c9f906fe61537144ef0274c19895e7134e
Depends-On: https://review.openstack.org/#/c/592762/
Story: 2002641
Task: 22319
diff --git a/patrole_tempest_plugin/tests/api/network/test_policy_bandwidth_limit_rule_rbac.py b/patrole_tempest_plugin/tests/api/network/test_policy_bandwidth_limit_rule_rbac.py
new file mode 100644
index 0000000..8f9635d
--- /dev/null
+++ b/patrole_tempest_plugin/tests/api/network/test_policy_bandwidth_limit_rule_rbac.py
@@ -0,0 +1,109 @@
+# Copyright 2017 AT&T Corporation.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.common import utils
+from tempest.lib.common.utils import data_utils
+from tempest.lib.common.utils import test_utils
+from tempest.lib import decorators
+
+from patrole_tempest_plugin import rbac_rule_validation
+from patrole_tempest_plugin.tests.api.network import rbac_base as base
+
+
+class PolicyBandwidthLimitRulePluginRbacTest(base.BaseNetworkPluginRbacTest):
+
+    @classmethod
+    def skip_checks(cls):
+        super(PolicyBandwidthLimitRulePluginRbacTest, cls).skip_checks()
+        if not utils.is_extension_enabled('qos', 'network'):
+            msg = "qos extension not enabled."
+            raise cls.skipException(msg)
+
+    @classmethod
+    def resource_setup(cls):
+        super(PolicyBandwidthLimitRulePluginRbacTest, cls).resource_setup()
+        name = data_utils.rand_name(cls.__class__.__name__ + '-qos-policy')
+        cls.policy_id = cls.ntp_client.create_qos_policy(
+            name=name)["policy"]["id"]
+        cls.addClassResourceCleanup(cls.ntp_client.delete_qos_policy,
+                                    cls.policy_id)
+
+    def _create_bandwidth_limit_rule(self):
+        rule = self.ntp_client.create_bandwidth_limit_rule(
+            self.policy_id, max_kbps=1000, max_burst_kbps=1000,
+            direction="egress")
+        rule_id = rule['bandwidth_limit_rule']['id']
+        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
+                        self.ntp_client.delete_bandwidth_limit_rule,
+                        self.policy_id, rule_id)
+        return rule_id
+
+    @decorators.idempotent_id('E0FDCB39-E16D-4AF5-9165-3FEFD116E69D')
+    @rbac_rule_validation.action(
+        service="neutron", rules=["create_policy_bandwidth_limit_rule"])
+    def test_create_policy_bandwidth_limit_rule(self):
+        """Create bandwidth_limit_rule.
+
+        RBAC test for the neutron "create_policy_bandwidth_limit_rule" policy
+        """
+
+        with self.rbac_utils.override_role(self):
+            self._create_bandwidth_limit_rule()
+
+    @decorators.idempotent_id('A092BD50-364F-4F55-B81A-37DAD6E77B95')
+    @rbac_rule_validation.action(service="neutron",
+                                 rules=["get_policy_bandwidth_limit_rule"],
+                                 expected_error_codes=[404])
+    def test_show_policy_bandwidth_limit_rule(self):
+        """Show bandwidth_limit_rule.
+
+        RBAC test for the neutron "get_policy_bandwidth_limit_rule" policy
+        """
+        rule_id = self._create_bandwidth_limit_rule()
+
+        with self.rbac_utils.override_role(self):
+            self.ntp_client.show_bandwidth_limit_rule(self.policy_id, rule_id)
+
+    @decorators.idempotent_id('CAA27599-082B-44B9-AF09-8C9B8E777ED7')
+    @rbac_rule_validation.action(service="neutron",
+                                 rules=["get_policy_bandwidth_limit_rule",
+                                        "update_policy_bandwidth_limit_rule"],
+                                 expected_error_codes=[404, 403])
+    def test_update_policy_bandwidth_limit_rule(self):
+        """Update bandwidth_limit_rule.
+
+        RBAC test for the neutron "update_policy_bandwidth_limit_rule" policy
+        """
+        rule_id = self._create_bandwidth_limit_rule()
+
+        with self.rbac_utils.override_role(self):
+            self.ntp_client.update_bandwidth_limit_rule(
+                self.policy_id, rule_id, max_kbps=2000)
+
+    @decorators.idempotent_id('BF6D9ED7-4B04-423D-857D-455DB0705852')
+    @rbac_rule_validation.action(service="neutron",
+                                 rules=["get_policy_bandwidth_limit_rule",
+                                        "delete_policy_bandwidth_limit_rule"],
+                                 expected_error_codes=[404, 403])
+    def test_delete_policy_bandwidth_limit_rule(self):
+        """Delete bandwidth_limit_rule.
+
+        RBAC test for the neutron "delete_policy_bandwidth_limit_rule" policy
+        """
+        rule_id = self._create_bandwidth_limit_rule()
+
+        with self.rbac_utils.override_role(self):
+            self.ntp_client.delete_bandwidth_limit_rule(self.policy_id,
+                                                        rule_id)