fixed strange compilation issues

rpc/src/v1/impls/blockchain.rs

@@ -156,6 +156,7 @@ pub mod tests {
 	use primitives::bytes::Bytes as GlobalBytes;
 	use primitives::hash::H256 as GlobalH256;
 	use v1::types::{VerboseBlock, RawBlock};
+	use v1::traits::BlockChain;
 	use test_data;
 	use super::*;
 

rpc/src/v1/types/get_block_response.rs

@@ -69,6 +69,7 @@ impl Serialize for GetBlockResponse {
 mod tests {
 	use super::super::bytes::Bytes;
 	use super::super::hash::H256;
+	use super::super::uint::U256;
 	use serde_json;
 	use super::*;