Revert and redo #952 (#1133)

* Revert "Pruning changes trie without digests (#952)"

This reverts commit 6f9a505fba.

* pruning changes tries without digests

* u64::max_value()

* Update wasm files and fix merge conflict

* Fixes tests

substrate/srml/treasury/src/lib.rs

@@ -330,12 +330,14 @@ mod tests {
 			creation_fee: 0,
 			existential_deposit: 0,
 			reclaim_rebate: 0,
+			_genesis_phantom_data: Default::default(),
 		}.build_storage().unwrap().0);
 		t.extend(GenesisConfig::<Test>{
 			proposal_bond: Permill::from_percent(5),
 			proposal_bond_minimum: 1,
 			spend_period: 2,
 			burn: Permill::from_percent(50),
+			_genesis_phantom_data: Default::default(),
 		}.build_storage().unwrap().0);
 		t.into()
 	}