Fix failing compute volume attachment tests.

This patch fixes the failing tests in compute's
test_server_volume_attachments_rbac, due to a recent change
in tempest.common.waiters.

Change-Id: I5e287844042df4b097c3e478576b17bc926c1cd3
diff --git a/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py
index 8f96110..4e85fbe 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py
@@ -35,96 +35,77 @@
     @classmethod
     def skip_checks(cls):
         super(ServerVolumeAttachmentRbacTest, cls).skip_checks()
-        if not CONF.compute_feature_enabled.api_extensions:
-            raise cls.skipException(
-                '%s skipped as no compute extensions enabled' % cls.__name__)
+        if not CONF.service_available.cinder:
+            skip_msg = ("%s skipped as Cinder is not available" % cls.__name__)
+            raise cls.skipException(skip_msg)
 
     @classmethod
     def resource_setup(cls):
         super(ServerVolumeAttachmentRbacTest, cls).resource_setup()
         cls.server = cls.create_test_server(wait_until='ACTIVE')
-
-    @classmethod
-    def resource_cleanup(cls):
-        test_utils.call_and_ignore_notfound_exc(cls.delete_server,
-                                                cls.server['id'])
-        super(ServerVolumeAttachmentRbacTest, cls).resource_cleanup()
+        cls.volume = cls.create_volume()
 
     def tearDown(self):
         self.rbac_utils.switch_role(self, switchToRbacRole=False)
         super(ServerVolumeAttachmentRbacTest, self).tearDown()
 
-    def _create_and_attach(self):
-        self.volume = self.create_volume()
-        self.attachment = self._attach(self.server, self.volume)
-
-    def _attach(self, server, volume):
-        attachment = self.client.attach_volume(
-            server['id'],
-            volumeId=volume['id'])['volumeAttachment']
-        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
-                        self._detach, server['id'], volume['id'])
-        waiters.wait_for_volume_status(self.volumes_client, volume['id'],
-                                       'in-use')
-        return attachment
-
-    def _detach(self, server_id, volume_id):
-        # For test_update_volume_attachment, an addCleanup is called with
-        # a stale volume, because a new volume is attached, so only detach
-        # the new volume to avoid a bad request error.
-        if hasattr(self, 'volume') and self.volume['id'] == volume_id:
-            self.client.detach_volume(server_id, volume_id)
-            waiters.wait_for_volume_status(self.volumes_client, volume_id,
-                                           'available')
-
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:index")
     @decorators.idempotent_id('529b668b-6edb-41d5-8886-d7dbd0614678')
     def test_list_volume_attachments(self):
         self.rbac_utils.switch_role(self, switchToRbacRole=True)
-        self.client.list_volume_attachments(self.server['id'])
-        ['volumeAttachments']
+        self.client.list_volume_attachments(self.server['id'])[
+            'volumeAttachments']
 
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:create")
     @decorators.idempotent_id('21c2c3fd-fbe8-41b1-8ef8-115ec47d54c1')
     def test_create_volume_attachment(self):
-        self.volume = self.create_volume()
         self.rbac_utils.switch_role(self, switchToRbacRole=True)
-        self._attach(self.server, self.volume)
+        self.attach_volume(self.server, self.volume)
 
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:show")
     @decorators.idempotent_id('997df9c2-6e54-47b6-ab74-e4fdb500f385')
     def test_show_volume_attachment(self):
-        self._create_and_attach()
+        attachment = self.attach_volume(self.server, self.volume)
         self.rbac_utils.switch_role(self, switchToRbacRole=True)
         self.client.show_volume_attachment(
-            self.server['id'], self.attachment['id'])
+            self.server['id'], attachment['id'])
 
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:update")
     @decorators.idempotent_id('bd667186-eca6-4b78-ab6a-3e2fabcb971f')
     def test_update_volume_attachment(self):
-        self._create_and_attach()
-        self.volume = self.create_volume()
+        attachment = self.attach_volume(self.server, self.volume)
+        alt_volume = self.create_volume()
         self.rbac_utils.switch_role(self, switchToRbacRole=True)
         self.client.update_attached_volume(
-            self.server['id'], self.attachment['id'],
-            volumeId=self.volume['id'])
-        self.addCleanup(self._detach, self.server['id'], self.volume['id'])
-        waiters.wait_for_volume_status(self.volumes_client, self.volume['id'],
-                                       'in-use')
+            self.server['id'], attachment['id'], volumeId=alt_volume['id'])
+        waiters.wait_for_volume_resource_status(self.volumes_client,
+                                                alt_volume['id'], 'in-use')
+        # On teardown detach the volume and wait for it to be available. This
+        # is so we don't error out when trying to delete the volume during
+        # teardown.
+        self.addCleanup(waiters.wait_for_volume_resource_status,
+                        self.volumes_client, alt_volume['id'], 'available')
+        # Ignore 404s on detach in case the server is deleted or the volume
+        # is already detached.
+        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
+                        self.servers_client.detach_volume,
+                        self.server['id'], alt_volume['id'])
 
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:delete")
     @decorators.idempotent_id('12b03e90-d087-46af-9c4d-507d021c4984')
     def test_delete_volume_attachment(self):
-        self._create_and_attach()
+        self.attach_volume(self.server, self.volume)
         self.rbac_utils.switch_role(self, switchToRbacRole=True)
-        self._detach(self.server['id'], self.volume['id'])
+        self.client.detach_volume(self.server['id'], self.volume['id'])
+        waiters.wait_for_volume_resource_status(self.volumes_client,
+                                                self.volume['id'], 'available')