[CORD-2711]
Use hardcoded fabric MAC address

Change-Id: I4ce29d40dcad030116f06f767c36445b38c7f514
diff --git a/roles/cord-profile/defaults/main.yml b/roles/cord-profile/defaults/main.yml
index 9e689eb..10139d9 100644
--- a/roles/cord-profile/defaults/main.yml
+++ b/roles/cord-profile/defaults/main.yml
@@ -152,6 +152,10 @@
 use_fabric: False
 fabric_network_cfg_json: {}
 
+# The following value is hardcoded and should be identical to here:
+# https://github.com/opencord/maas/blob/master/config-generator/netconfig.tpl#L29
+fabric_gateway_hwaddr: "a4:23:05:06:01:01"
+
 # base URL of maven repo where ONOS apps are retrieved
 onos_mavenrepo_url: "{{ 'http://mavenrepo.' ~ site_suffix ~ ':8080' }}"