Core/Scripts: fixed startup errors

Closes #14730

sql/updates/world/2015_12_09_00_world.sql

@@ -0,0 +1,5 @@
+UPDATE `creature_template` SET `ScriptName`='npc_brann_bronzebeard_ulduar_intro' WHERE `entry`=33579;
+DELETE FROM `spell_linked_spell` WHERE `spell_trigger`=48750 AND `spell_effect`=48770;
+DELETE FROM `spell_script_names` WHERE `ScriptName`='spell_gen_burning_depths_necrolyte_image';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(48750, 'spell_gen_burning_depths_necrolyte_image');