Add ability to pass hardware metadata

Related-Prod: PRODX-00000
Change-Id: I4c377558ffe13e28f8ac5ced45262ff67556f46c
diff --git a/de/heat-templates/env/mstr1-wrkr3-cmp0-gtw0.yaml b/de/heat-templates/env/mstr1-wrkr3-cmp0-gtw0.yaml
index e97ebd1..755e66f 100644
--- a/de/heat-templates/env/mstr1-wrkr3-cmp0-gtw0.yaml
+++ b/de/heat-templates/env/mstr1-wrkr3-cmp0-gtw0.yaml
@@ -23,3 +23,4 @@
   worker_metadata: {"labels": {"openstack-control-plane":"enabled","openstack-compute-node":"enabled","openvswitch":"enabled", "openstack-gateway":"enabled","role":"ceph-osd-node"}}
   cmp_metadata: {"labels": {"openstack-compute-node":"enabled","openvswitch":"enabled", "role":"ceph-osd-node"}}
   gtw_metadata: {"labels": {"openvswitch":"enabled"}}
+  hardware_metadata: ''