MT#15883 rtc_session allow non-unique subscriber_id

Change-Id: If965f43ce2ab69b98a23edba428a1a474970637a

db_scripts/diff/15216.down

@@ -0,0 +1,13 @@
+set autocommit=0;
+USE provisioning;
+
+ALTER TABLE provisioning.rtc_session
+    DROP FOREIGN KEY tl_subscriber_ref,
+    DROP KEY subscriber_idx;
+
+ALTER TABLE provisioning.rtc_session
+    ADD UNIQUE KEY subscriber_idx (subscriber_id),
+    ADD CONSTRAINT tl_subscriber_ref FOREIGN KEY subscriber_idx (subscriber_id)
+        REFERENCES voip_subscribers (id) ON DELETE CASCADE ON UPDATE CASCADE;
+
+commit;

db_scripts/diff/15216.up

@@ -0,0 +1,13 @@
+set autocommit=0;
+USE provisioning;
+
+ALTER TABLE provisioning.rtc_session
+    DROP FOREIGN KEY tl_subscriber_ref,
+    DROP KEY subscriber_idx;
+
+ALTER TABLE provisioning.rtc_session
+    ADD KEY subscriber_idx (subscriber_id),
+    ADD CONSTRAINT tl_subscriber_ref FOREIGN KEY subscriber_idx (subscriber_id)
+        REFERENCES voip_subscribers (id) ON DELETE CASCADE ON UPDATE CASCADE;
+
+commit;