some test case names not unique

Non-unique test names are inconvenient since it requires printing the whole path in order to distinguish test cases in results. For instance, the name `callcallcallcode_001` is used for three different test cases: [stCallCodes](https://github.com/ethereum/tests/blob/7a7e0770db6519acdbe1b17c847e5bff62bc1260/src/GeneralStateTestsFiller/stCallCodes/callcallcallcode_001Filler.json#L2), [stCallDelegateCodesCallCodeHomestead](https://github.com/ethereum/tests/blob/e8ba92a9e20a252d215cbc95d314eba22b1d79c5/src/GeneralStateTestsFiller/stCallDelegateCodesCallCodeHomestead/callcallcallcode_001Filler.json), and [stCallDelegateCodesHomestead](https://github.com/ethereum/tests/blob/e8ba92a9e20a252d215cbc95d314eba22b1d79c5/src/GeneralStateTestsFiller/stCallDelegateCodesHomestead/callcallcallcode_001Filler.json).