DB/Loot: Fix 9 drop chance in gameobject_template (7 quests should be fixed by this)

If a GO with flags 4 drops a quest item, ChanceOrQuestChance for that items needs to be negative

Query used to find the issue:
```
SELECT * FROM `gameobject_loot_template`
    WHERE (`item` IN (SELECT `questItem1` FROM `gameobject_template` WHERE (`flags` & 4) != 0) OR
           `item` IN (SELECT `questItem2` FROM `gameobject_template` WHERE (`flags` & 4) != 0) OR
           `item` IN (SELECT `questItem3` FROM `gameobject_template` WHERE (`flags` & 4) != 0) OR
           `item` IN (SELECT `questItem4` FROM `gameobject_template` WHERE (`flags` & 4) != 0) OR
           `item` IN (SELECT `questItem5` FROM `gameobject_template` WHERE (`flags` & 4) != 0) OR
           `item` IN (SELECT `questItem6` FROM `gameobject_template` WHERE (`flags` & 4) != 0)) AND
          `ChanceOrQuestChance` > 0;
```