DB/Misc: Fix few startup errors

sql/updates/world/4.3.4/2018_04_11_00_world.sql

@@ -0,0 +1,3 @@
+--
+UPDATE `creature_template` SET `npcflag`=`npcflag`|2 WHERE `entry` IN (34835,34876,34877,34878,35175,35200,37203);
+DELETE FROM `creature_addon` WHERE guid IN (253116,253244,253268,253269,253270);