Revert "Replace gtw with workers"

This reverts commit 58b777ed5857339426af89d71e4ae466994a0c1e.

Reason for revert: PRODX-00001

Change-Id: I4a97c1399005a528fe26a7a0e2f06bd6d23477a4
diff --git a/de/heat-templates/env/mstr3-wrkr3-cmp2-gtw3-lma3-osd3.yaml b/de/heat-templates/env/mstr3-wrkr3-cmp2-gtw3-lma3-osd3.yaml
index 2da5814..cb62d99 100644
--- a/de/heat-templates/env/mstr3-wrkr3-cmp2-gtw3-lma3-osd3.yaml
+++ b/de/heat-templates/env/mstr3-wrkr3-cmp2-gtw3-lma3-osd3.yaml
@@ -15,9 +15,9 @@
   public_net_id: public
   host_interface: 'ens3'
   masters_size: 2
-  worker_size: 5
+  worker_size: 3
   cmp_size: 2
-  gtw_size: 0
+  gtw_size: 3
   lma_size: 3
   osd_size: 3
   ucp_boot_timeout: 1200