DB/SpawnGroup: Reserve group IDs 52 through 56 for Culling of Stratholme rewrite

sql/updates/world/3.3.5/2018_02_21_01_world.sql

@@ -0,0 +1,8 @@
+-- 
+DELETE FROM `spawn_group_template` WHERE `groupId` BETWEEN 52 AND 56;
+INSERT INTO `spawn_group_template` (`groupId`,`groupName`,`groupFlags`) VALUES
+(52, "Culling of Stratholme - Chromie (middle)", 4),
+(53, "Culling of Stratholme - Crate Helpers", 4),
+(54, "Culling of Stratholme - Undead - Gauntlet", 4),
+(55, "Culling of Stratholme - Undead", 4),
+(56, "Culling of Stratholme - Stratholme residents", 4);