TT#11432 make index on cf_source_sets more loose

by adding the subscriber_id. This is still fine, to reference them
uniquely per subscriber but allows e.g. for the same name in different
subscriber like the automatically created sets like "quickset_cfu".

Change-Id: If72354639f501e8925680a664ef61951940b8ece

db_scripts/diff/15331.down

@@ -0,0 +1,6 @@
+USE provisioning;
+
+ALTER TABLE `provisioning`.`voip_cf_source_sets` 
+ADD UNIQUE INDEX `cf_sourcesets_name_unique` (`name` ASC),
+DROP INDEX `cf_sourcesets_sid_name_unique`;
+

db_scripts/diff/15331.up

@@ -0,0 +1,6 @@
+USE provisioning;
+
+ALTER TABLE `provisioning`.`voip_cf_source_sets` 
+ADD UNIQUE INDEX `cf_sourcesets_sid_name_unique` (`subscriber_id` ASC, `name` ASC),
+DROP INDEX `cf_sourcesets_name_unique`;
+