Integration tests (#805)

* Started substrate tests

* Sync test

* Test updates

* Improved tests

* Use on-chain block delay

* Parallel test execution

* Otimized tests

* Logging

* Fixed racing test

* Fixed compilation

* Fixed timestamp test

* Removed rlp dependency

* Minor fixes

* Fixed tests

* Removed best_block_id and resolved fdlimit issue

* Whitespace

* Use keyring

* Style

* Added API execution setting

* Removed stale import

substrate/core/client/db/src/light.rs

@@ -154,6 +154,7 @@ impl<Block> BlockchainHeaderBackend<Block> for LightStorage<Block>
 			best_number: meta.best_number,
 			genesis_hash: meta.genesis_hash,
 			finalized_hash: meta.finalized_hash,
+			finalized_number: meta.finalized_number,
 		})
 	}