DB/Gossip: Mor'zul Bloodbringer

Closes #20475

sql/updates/world/3.3.5/2017_09_30_08_world_335.sql

@@ -0,0 +1,6 @@
+-- 
+SET @MENUID := 5817;
+UPDATE `creature_template` SET `gossip_menu_id`=@MENUID WHERE `entry`=14436;
+DELETE FROM `gossip_menu` WHERE `MenuID`=@MENUID;
+INSERT INTO `gossip_menu` (`MenuID`, `TextID`, `VerifiedBuild`) VALUES
+(@MENUID, 6990, 0);