moving back to tier_id from loopback since we need that in more cases than just loopback

files/dhcp-loopback

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if [ ! -z $new_loopback ]; then
-   sed -ie '/^LOOPBACK=.*/d' /etc/environment
-   echo "LOOPBACK=$new_loopback" >>/etc/environment
+if [ ! -z $new_tier_id ]; then
+   sed -ie '/^TIER_ID=.*/d' /etc/environment
+   echo "TIER_ID=$new_tier_id" >>/etc/environment
 fi