DB/Spell: stop some auras from removing stealth

- They have damage class melee and proc PROC_FLAG_TAKEN_SPELL_MELEE_DMG_CLASS
- Sated/Exhaustion are negative auras, counts as negative spell flag, and stealth drops too

Closes #18421
Closes #18553

sql/updates/world/3.3.5/2016_12_29_00_world_335.sql

@@ -0,0 +1,8 @@
+DELETE FROM `spell_custom_attr` WHERE `entry` IN (51699, 52910, 52914, 52915, 52916, 57723, 57724);
+INSERT INTO `spell_custom_attr` (`entry`, `attributes`) VALUES
+(52910, 0x40), -- Turn the Tables
+(52914, 0x40), -- Turn the Tables
+(52915, 0x40), -- Turn the Tables
+(52916, 0x40), -- Honor Among Thieves
+(57723, 0x40), -- Exhaustion
+(57724, 0x40); -- Sated