Replace gtw with workers

The patch temporary replaces gtw nodes with workers for
mstr3-wrkr3-cmp2-gtw3-lma3-osd3 in order to debug resources
issue.

Related-Prod: PRODX-00000
Change-Id: I02130e44172a0b8a7232226a0569ff9af3f375f7
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 cb62d99..2da5814 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: 3
+  worker_size: 5
   cmp_size: 2
-  gtw_size: 3
+  gtw_size: 0
   lma_size: 3
   osd_size: 3
   ucp_boot_timeout: 1200