[Workers] Added parametrization of osapi_compute_worker and workers.

Change-Id: Ib916c4e7631e5d058d1c352a670a92edb05adc8b
diff --git a/tests/pillar/control_cluster.sls b/tests/pillar/control_cluster.sls
index 2de3368..5e33712 100644
--- a/tests/pillar/control_cluster.sls
+++ b/tests/pillar/control_cluster.sls
@@ -10,6 +10,7 @@
     cpu_allocation_ratio: 16.0
     ram_allocation_ratio: 1.5
     disk_allocation_ratio: 1.0
+    workers: 8
     bind:
       private_address: 127.0.0.1
       public_address: 127.0.0.1