Revert r13198 as this was stupid.

db_scripts/diff/13127.down

@@ -1,5 +0,0 @@
-USE provisioning;
-
-ALTER TABLE voip_peer_groups DROP COLUMN inbound_peering_contract_id; 
-ALTER TABLE voip_peer_groups CHANGE COLUMN outbound_peering_contract_id
-  peering_contract_id INT(11) unsigned;

db_scripts/diff/13127.up

@@ -1,6 +0,0 @@
-USE provisioning;
-
-ALTER TABLE voip_peer_groups CHANGE peering_contract_id 
-  outbound_peering_contract_id int(11) unsigned;
-ALTER TABLE voip_peer_groups ADD COLUMN 
-  inbound_peering_contract_id int(11) unsigned;