Fix solidity testing on private chain

[AtkinsChang]

Fix critical testing problem on private chain: solidity testing will success even if there is an error occurs.

According to EIP658, if the transaction success, the transaction receipt will contains status with value 0x1, and revert is 0x0.

[AtkinsChang]

@gnidan: I think this issue is critical that test result is not correct on real eth-chain