[CORD-2677]
Use padded MAC addresses for ONOS 1.12 compat

Change-Id: Idaa1b95d8e8552f5ecb4ca2cb419b2f9c7944fbf
diff --git a/roles/interface-config/templates/management.cfg.j2 b/roles/interface-config/templates/management.cfg.j2
index de8d942..d366660 100644
--- a/roles/interface-config/templates/management.cfg.j2
+++ b/roles/interface-config/templates/management.cfg.j2
@@ -11,7 +11,7 @@
   network {{ vtn_net_management_host_cidr | ipaddr('network') }}
   netmask {{ vtn_net_management_host_cidr | ipaddr('netmask') }}
   broadcast {{ vtn_net_management_host_cidr | ipaddr('broadcast') }}
-  hwaddress ether {{ ( vtn_net_management_host_hwaddr_prefix ~ ( mgmtbr_ip | ip4_hex )) | hwaddr('unix') }}
+  hwaddress ether {{ ( vtn_net_management_host_hwaddr_prefix ~ ( mgmtbr_ip | ip4_hex )) | hwaddr('linux') }}
   dns-search {{ site_suffix }}
   dns-nameservers {{ dns_servers | join(" ") }}
   post-down ip link del mgmtbridge