Add keystone create_and_list_services scenario

This scenario covers create keystone service and then list all services

Change-Id: I4e8cff9dfb6c522abd7d136f6e37b442ee44a4d9

rally-jobs/rally.yaml

@@ -108,6 +108,16 @@
         failure_rate:
           max: 0
 
+  KeystoneBasic.create_and_list_services:
+    -
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 5
+      sla:
+        failure_rate:
+          max: 0
+
   CeilometerAlarms.create_alarm:
     -
       args:

samples/tasks/scenarios/keystone/create-and-list-services.json

@@ -0,0 +1,16 @@
+{
+    "KeystoneBasic.create_and_list_services": [
+    {
+            "args": {
+                "name": "Rally_test_service",
+                "service_type": "Really_test_type",
+                "description": "test_description"
+            },
+            "runner": {
+                "type": "constant",
+                "times": 100,
+                "concurrency": 10
+            }
+        }
+    ]
+}

samples/tasks/scenarios/keystone/create-and-list-services.yaml

@@ -0,0 +1,11 @@
+---
+  KeystoneBasic.create_and_list_services:
+    -
+      args:
+        name: "Rally_test_service"
+        service_type: "Really_test_type"
+        description: "test_description"
+      runner:
+        type: "constant"
+        times: 100
+        concurrency: 10