DB/Fishing: Add fishing level to Undercity

By AriDEV, closes #12929

sql/updates/world/2014_08_26_02_world_skill_fishing_base_level.sql

@@ -0,0 +1,4 @@
+-- Add skill_fishing_base_level -20 to Undercity, based on other capital cities
+DELETE FROM `skill_fishing_base_level` WHERE `entry`=1497;
+INSERT INTO `skill_fishing_base_level` (`entry`, `skill`) VALUES
+(1497, -20);