Use correct db for scripts.

db_scripts/diff/13838.down

@@ -1,3 +1,3 @@
-USE billing;
+USE provisioning;
 
 ALTER TABLE voip_preferences DROP COLUMN expose_to_customer;

db_scripts/diff/13838.up

@@ -1,4 +1,4 @@
-USE billing;
+USE provisioning;
 
 ALTER TABLE voip_preferences ADD COLUMN 
   expose_to_customer TINYINT(1) NOT NULL DEFAULT 0 AFTER internal;