Stromgarde fixes

There shouldn't be any syndicate thieves in Stromgarde
this non-elite gave easy access to quest items

Sigil of Strom had 100% drop chance. this is incorrect
now set to 5%

sql/world/base/zone_arathi_highlands.sql

@@ -0,0 +1,11 @@
+-- remove non elite Syndicate thief from Stromgarde
+DELETE FROM `creature` WHERE `id1` = 24477;
+
+-- delete all guids for id1 24477 from creature_addon
+DELETE FROM `creature_addon` WHERE `guid` IN 
+(11650, 11699, 11700, 14522, 14538, 14539, 14540, 
+14548, 14553, 14554, 14555, 14567, 14569, 14580, 
+14584, 14635, 14640, 14641, 14648, 14649, 14651);
+
+-- set drop rate of sigil of strom to 5%, was 100%
+UPDATE `creature_loot_template` SET `Chance` = 5 WHERE `Item` = 4440;