Add more tests to mistral rally

One more executions test. This one will run a workbook that has a
nested workflow with a join all.

Change-Id: I107eaf3a666a4e07ea9364c4948c74704edc8276

rally-jobs/extra/nested_wb.yaml

@@ -0,0 +1,73 @@
+---
+version: "2.0"
+
+name: wb
+
+workflows:
+
+  wrapping_wf:
+    type: direct
+    tasks:
+      call_inner_wf_1:
+        workflow: inner_wf
+      call_inner_wf_2:
+        workflow: inner_wf
+      call_inner_wf_3:
+        workflow: inner_wf
+      call_inner_wf_4:
+        workflow: inner_wf
+
+  inner_wf:
+    type: direct
+    tasks:
+      hello1:
+        action: std.echo output="Hello"
+        publish:
+            result: $
+      hello2:
+        action: std.echo output="Hello"
+        publish:
+            result: $
+        on-success:
+          - world
+      hello3:
+        action: std.echo output="Hello"
+        publish:
+            result: $
+        on-success:
+          - world
+      hello4:
+        action: std.echo output="Hello"
+        publish:
+            result: $
+        on-success:
+          - world
+
+      world:
+        action: std.echo output="World"
+        join: all
+        publish:
+            result: $
+        on-success:
+          - test1
+          - test2
+          - test3
+          - test4
+
+      test1:
+        action: std.echo output="Test!!"
+        publish:
+            result: $
+      test2:
+        action: std.echo output="Test!!"
+        publish:
+            result: $
+      test3:
+        action: std.echo output="Test!!"
+        publish:
+            result: $
+      test4:
+        action: std.echo output="Test!!"
+        publish:
+            result: $
+

rally-jobs/task-mistral.yaml

@@ -45,6 +45,20 @@
         failure_rate:
           max: 0
 
+  MistralExecutions.list_executions:
+    -
+      runner:
+        type: "constant"
+        times: 50
+        concurrency: 10
+      context:
+        users:
+          tenants: 1
+          users_per_tenant: 1
+      sla:
+        failure_rate:
+          max: 0
+
   MistralExecutions.create_execution_from_workbook:
     -
       args:
@@ -62,16 +76,19 @@
         failure_rate:
           max: 0
 
-  MistralExecutions.list_executions:
     -
+      args:
+        definition: "/home/jenkins/.rally/extra/nested_wb.yaml"
+        workflow_name: "wrapping_wf"
+        do_delete: true
       runner:
         type: "constant"
-        times: 50
-        concurrency: 10
+        times: 20
+        concurrency: 5
       context:
         users:
           tenants: 1
           users_per_tenant: 1
       sla:
         failure_rate:
-          max: 0
+          max: 0