Change storage_backend_network_cidr

The patch chnages storage_backend_network_cidr to the same cidr
as for storage_frontend_network_cidr for instances which are not
connected to this network because only OSD nodes are switched to
both networks.

Related-PROD: PRODX-2799
Change-Id: I08d2ed3403b4a7c926593423e32474abe70d1968
diff --git a/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml b/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml
index 3c9ae9d..d1bf11a 100644
--- a/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml
+++ b/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml
@@ -40,6 +40,8 @@
   gtw_metadata: {"labels": {"openvswitch":"enabled"}}
   tunnel_interface: 'enp3s0f0'
   live_migration_interface: 'enp3s0f0'
+  storage_frontend_network_cidr: '10.12.0.0/24'
+  storage_backend_network_cidr: '10.12.0.0/24'
   functions_override: |
     function network_config {
         PUBLIC_NODE_IP_ADDRESS=${PUBLIC_INTERFACE_IP:-$(ip addr show dev ${PUBLIC_INTERFACE} | grep -Po 'inet \K[\d.]+' | egrep -v "127.0.|172.17")}