[CORD-1650]
Finish changeover to new network configuration variables

Change-Id: I9d96c49e908245d009976ae101ca4b704e8dbab8
diff --git a/roles/interface-config/defaults/main.yml b/roles/interface-config/defaults/main.yml
index 6e2b541..b3bc9e2 100644
--- a/roles/interface-config/defaults/main.yml
+++ b/roles/interface-config/defaults/main.yml
@@ -31,7 +31,7 @@
 
 # management network configuration
 management_net_cidr: "10.1.0.0/24"
-management_net_bridge: "mgmtbr"
+management_net_bridge: "mgmtbridge"
 
 dns_servers:
   - "{{ management_net_cidr | ipaddr('1') | ipaddr('address') }}"