Revert "Disable sahara scenarios from dsvm-rally"

I24db502e217e6505ce380e7b7d68d354648817a5 should fix the issue with sahara
scenarios, so we can turn on them back, since fix already merged.

This reverts commit a1dd31def200a6876df5cf4a09542a363c8d6ffb.

Change-Id: I76736a2ae390f11df49cd6527470c61cff91b1d7

rally-jobs/rally.yaml

@@ -787,6 +787,40 @@
         failure_rate:
           max: 0
 
+  SaharaNodeGroupTemplates.create_and_list_node_group_templates:
+    -
+      args:
+        flavor:
+         name: "m1.small"
+      runner:
+        type: "constant"
+        times: 20
+        concurrency: 20
+      context:
+        users:
+          tenants: 1
+          users_per_tenant: 1
+      sla:
+        failure_rate:
+          max: 0
+
+  SaharaNodeGroupTemplates.create_delete_node_group_templates:
+    -
+      args:
+        flavor:
+         name: "m1.small"
+      runner:
+        type: "constant"
+        times: 20
+        concurrency: 20
+      context:
+        users:
+          tenants: 1
+          users_per_tenant: 1
+      sla:
+        failure_rate:
+          max: 0
+
   Authenticate.validate_glance:
     -
       args: