unify *_kwargs name in scenarios

When running a scenario, `kwargs` is used as default key-word arguments.
But in some scenarios, there are more and one services being called, and
we use xxx_kwargs for this case.

However, some xxx_kwargs are not unifed for same usage[0]. Unifying
these could avoid midleading for end users. Another improvement is to
add xxx_kwargs with empty settings for scenario config files.

[0] http://paste.openstack.org/show/489505/

Change-Id: I80f49be5c1cd21812d6b2d56b0f4279f0cf4f402

rally/plugins/openstack/scenarios/nova/keypairs.py

@@ -58,7 +58,7 @@ class NovaKeypair(utils.NovaScenario):
     @validation.required_openstack(users=True)
     @scenario.configure(context={"cleanup": ["nova"]})
     def boot_and_delete_server_with_keypair(self, image, flavor,
-                                            server_kwargs=None,
+                                            boot_server_kwargs=None,
                                             **kwargs):
         """Boot and delete server with keypair.
 
@@ -70,15 +70,16 @@ class NovaKeypair(utils.NovaScenario):
 
         :param image: ID of the image to be used for server creation
         :param flavor: ID of the flavor to be used for server creation
-        :param server_kwargs: Optional additional arguments for VM creation
+        :param boot_server_kwargs: Optional additional arguments for VM
+                                   creation
         :param kwargs: Optional additional arguments for keypair creation
         """
 
-        server_kwargs = server_kwargs or {}
+        boot_server_kwargs = boot_server_kwargs or {}
 
         keypair = self._create_keypair(**kwargs)
         server = self._boot_server(image, flavor,
                                    key_name=keypair,
-                                   **server_kwargs)
+                                   **boot_server_kwargs)
         self._delete_server(server)
         self._delete_keypair(keypair)

samples/tasks/scenarios/cinder/create-and-update-volume.json

@@ -2,6 +2,7 @@
     "CinderVolumes.create_and_update_volume": [
         {
             "args": {
+                "create_volume_kwargs": {},
                 "update_volume_kwargs": {
                     "display_name": "name_updated",
                     "display_description": "desc_updated"

samples/tasks/scenarios/cinder/create-and-update-volume.yaml

@@ -5,6 +5,7 @@
         update_volume_kwargs:
            display_name: "name_updated"
            display_description: "desc_updated"
+        create_volume_kwargs: {}
         size: 1
       runner:
         type: "constant"

samples/tasks/scenarios/nova/boot-and-delete-server-with-keypairs.json

@@ -8,7 +8,8 @@
                 },
                 "image": {
                     "name": "^cirros.*uec$"
-                }
+                },
+                "boot_server_kwargs": {}
             },
             "runner": {
                 "type": "constant",

samples/tasks/scenarios/nova/boot-and-delete-server-with-keypairs.yaml

@@ -7,6 +7,7 @@
             name: "{{flavor_name}}"
         image:
             name: "^cirros.*uec$"
+        boot_server_kwargs: {}
       runner:
         type: "constant"
         times: 5

samples/tasks/scenarios/nova/boot-server-attach-created-volume-and-live-migrate.json

@@ -10,7 +10,9 @@
                 },
                 "flavor": {
                     "name": "{{flavor_name}}"
-                }
+                },
+                "boot_server_kwargs": {},
+                "create_volume_kwargs": {}
             },
             "runner": {
                 "type": "constant",

samples/tasks/scenarios/nova/boot-server-attach-created-volume-and-live-migrate.yaml

@@ -8,6 +8,8 @@ NovaServers.boot_server_attach_created_volume_and_live_migrate:
       name: "^cirros.*uec$"
     size: 10
     block_migration: false
+    boot_server_kwargs: {}
+    create_volume_kwargs: {}
   runner:
     type: "constant"
     times: 5

tests/unit/plugins/openstack/scenarios/nova/test_keypairs.py

@@ -57,7 +57,7 @@ class NovaKeypairTestCase(test.ScenarioTestCase):
         }
 
         scenario.boot_and_delete_server_with_keypair(
-            "img", 1, server_kwargs=fake_server_args,
+            "img", 1, boot_server_kwargs=fake_server_args,
             fake_arg1="foo", fake_arg2="bar")
 
         scenario._create_keypair.assert_called_once_with(