[Workers] Added parametrization of osapi_compute_worker and workers.

Change-Id: Ib916c4e7631e5d058d1c352a670a92edb05adc8b
diff --git a/metadata/service/control/cluster.yml b/metadata/service/control/cluster.yml
index f23aada..2e2837c 100644
--- a/metadata/service/control/cluster.yml
+++ b/metadata/service/control/cluster.yml
@@ -18,6 +18,7 @@
       cpu_allocation_ratio: 16.0
       ram_allocation_ratio: 1.5
       disk_allocation_ratio: 1.0
+      workers: 8
       logging:
       - engine: syslog
         facility: local0