add: scenario will inherit feature's tag
add: scenario will inherit feature's tag

pipermerriam/pyethereum,harlantwood/pyethereum,jnnk/pyethereum,karlfloersch/pyethereum,ckeenan/pyethereum,ddworken/pyethereum,shahankhatch/pyethereum,ethereum/pyethereum,ethereum/pyethereum,ethers/pyethereum,pipermerriam/pyethereum,holiman/pyethereum,ebuchman/daoist_protocol,vaporry/pyethereum,ethermarket/pyethereum,ebuchman/daoist_protocol,karlfloersch/pyethereum,shahankhatch/pyethereum,inzem77/pyethereum