Revert "Core/Pets: Water Elementals are now permanent pets" (wrong branch)

This reverts commit 0136c86054.

Also add line ending to recently added SQL file

sql/updates/world/2011_11_27_00_world_spell_script.sql

@@ -3,4 +3,4 @@ INSERT INTO `spell_script_names` (`spell_id`,`ScriptName`) VALUES
 (20911,'spell_gen_damage_reduction_aura'), -- Blessing of Sanctuary
 (25899,'spell_gen_damage_reduction_aura'), -- Greater Blessing of Sanctuary
 (63944,'spell_gen_damage_reduction_aura'), -- Renewed Hope
-(50720,'spell_gen_damage_reduction_aura'); -- Vigilance
+(50720,'spell_gen_damage_reduction_aura'); -- Vigilance