Update HealEffects to depend on restoration logic

[e-aakash]

Change DoHealEvent to DoRestoreEvent.

How to test:

1. Checkout PR Health Overhaul MovingBlocks/Terasology#3677 branch
2. Checkout PR Add javadoc to restore events and RestorationAuthoritySystem Health#17 in Health module.
3. Start a new game with Potions and Core (which will add Health).
4. Console command setRegenRate 0, so that regeneration does not affect testing restoration
5. Console command damage 90 to cause damage to player.
6. Test heal potions:
   i. Console command give Potions:HealPotion, activate the potion. Health restores by 20
   ii. Console command give Potions:SuperHealPotion, activate the potion. Full health restored
   iii. Console command give Potions:UltraHealPotion, activate the potion. Full health restored

[syntaxi]

Nice and simple changes, and the other touch ups are good as well. Ready to merge whenever