MT#55686 ncos_sets add missing constrants

* add missing foregin key on reseller_id
* (reseller_id,name) is now a unique key

Change-Id: I0635e4cc3ac9bcd333fdddd13e987de182322d92

db_scripts/diff/15744.up

@@ -7,7 +7,8 @@ CREATE TABLE `ncos_sets` (
   `name` varchar(255) NOT NULL,
   `description` varchar(255) DEFAULT NULL,
   PRIMARY KEY (`id`),
-  KEY `resname_idx` (`reseller_id`,`name`)
+  UNIQUE KEY `resname_idx` (`reseller_id`,`name`),
+  CONSTRAINT `n_c_resellerid_ref` FOREIGN KEY (`reseller_id`) REFERENCES `resellers` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE=InnoDB;
 
 CREATE TABLE `ncos_set_levels` (