refactoring to hold miner within the client

sync/src/tests/chain.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use util::*;
-use ethcore::client::{BlockChainClient, BlockID, EachBlockWith};
+use ethcore::client::{MiningClient, BlockID, EachBlockWith};
 use chain::{SyncState};
 use super::helpers::*;
 

sync/src/tests/helpers.rs

@@ -63,7 +63,7 @@ impl<'p> SyncIo for TestIo<'p> {
 		Ok(())
 	}
 
-	fn chain(&self) -> &BlockChainClient {
+	fn chain(&self) -> &MiningClient {
 		self.chain
 	}
 }