Another fix for inbound billing.

This should be the final fix (tm), as setting a direction
in the fees has the least impact on the rest of the
billing logic (compared to having two billing profiles, which
implies two contract balances).

db_scripts/diff/13127.down

@@ -1,14 +1,3 @@
 USE billing;
 
-ALTER TABLE billing_mappings DROP FOREIGN KEY b_m_out_bilprofid_ref;
-ALTER TABLE billing_mappings DROP FOREIGN KEY b_m_in_bilprofid_ref;
-ALTER TABLE billing_mappings DROP KEY out_profileid_idx;
-ALTER TABLE billing_mappings DROP KEY in_profileid_idx;
-
-ALTER TABLE billing_mappings CHANGE outbound_billing_profile_id
-  billing_profile_id int(11) unsigned;
-
-ALTER TABLE billing_mappings ADD KEY profileid_idx(billing_profile_id);
-ALTER TABLE billing_mappings ADD CONSTRAINT b_m_bilprofid_ref
-  FOREIGN KEY(billing_profile_id) REFERENCES billing_profiles(id) 
-  ON UPDATE CASCADE;
+ALTER TABLE billing_fees DROP COLUMN direction;

db_scripts/diff/13127.up

@@ -1,19 +1,5 @@
 USE billing;
 
-ALTER TABLE billing_mappings DROP FOREIGN KEY b_m_bilprofid_ref;
-ALTER TABLE billing_mappings DROP KEY profileid_idx;
-
-ALTER TABLE billing_mappings CHANGE billing_profile_id
-  outbound_billing_profile_id int(11) unsigned;
-ALTER TABLE billing_mappings ADD COLUMN 
-  inbound_billing_profile_id int(11) unsigned
-  AFTER outbound_billing_profile_id;
-
-ALTER TABLE billing_mappings ADD KEY out_profileid_idx(outbound_billing_profile_id);
-ALTER TABLE billing_mappings ADD KEY in_profileid_idx(inbound_billing_profile_id);
-ALTER TABLE billing_mappings ADD CONSTRAINT b_m_out_bilprofid_ref
-  FOREIGN KEY(outbound_billing_profile_id) REFERENCES billing_profiles(id) 
-  ON UPDATE CASCADE;
-ALTER TABLE billing_mappings ADD CONSTRAINT b_m_in_bilprofid_ref
-  FOREIGN KEY(inbound_billing_profile_id) REFERENCES billing_profiles(id) 
-  ON UPDATE CASCADE;
+ALTER TABLE billing_fees ADD COLUMN direction enum('in', 'out') 
+  NOT NULL DEFAULT 'out'
+  AFTER destination;