Set correct size for workers in ironic env

Related-Prod: PRODX-3456
Change-Id: I2083446383e4941a4e3469737b1745bc1a121bf7
diff --git a/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vbmc5.yaml b/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vbmc5.yaml
index 735d29a..c18536c 100644
--- a/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vbmc5.yaml
+++ b/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vbmc5.yaml
@@ -12,7 +12,7 @@
   image: bionic-server-cloudimg-amd64-20190612
   public_net_id: public
   masters_size: 0
-  worker_size: 5
+  worker_size: 3
   cmp_size: 2
   gtw_size: 0
   lma_size: 0