Add keystone get_entities scenario

API covered tenants.get, users.get, roles.get, services.get

Change-Id: I5cda3b91e22a818b0b9b5f75257144b0fa8c055f

rally-jobs/rally.yaml

@@ -36,6 +36,16 @@
         failure_rate:
           max: 0
 
+  KeystoneBasic.get_entities:
+    -
+      runner:
+        type: "constant"
+        times: 100
+        concurrency: 10
+      sla:
+        failure_rate:
+          max: 0
+
   KeystoneBasic.create_and_list_users:
     -
       args:

samples/tasks/scenarios/keystone/get-entities.json

@@ -0,0 +1,11 @@
+{
+    "KeystoneBasic.get_entities": [
+    {
+            "runner": {
+                "type": "constant",
+                "times": 100,
+                "concurrency": 10
+            }
+        }
+    ]
+}

samples/tasks/scenarios/keystone/get-entities.yaml

@@ -0,0 +1,7 @@
+---
+  KeystoneBasic.get_entities:
+    -
+      runner:
+        type: "constant"
+        times: 100
+        concurrency: 10

tests/unit/fakes.py

@@ -155,6 +155,10 @@ class FakeUser(FakeResource):
     pass
 
 
+class FakeService(FakeResource):
+    pass
+
+
 class FakeNetwork(FakeResource):
     pass