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/node/runtime/src/lib.rs

@@ -73,6 +73,8 @@ pub use runtime_primitives::BuildStorage;
 pub use consensus::Call as ConsensusCall;
 pub use timestamp::Call as TimestampCall;
 pub use runtime_primitives::{Permill, Perbill};
+pub use timestamp::BlockPeriod;
+pub use srml_support::StorageValue;
 #[cfg(any(feature = "std", test))]
 pub use checked_block::CheckedBlock;