New testStateDev test run command to allow for parallel Constantinople testing

[holgerd77]

No description provided.

[holgerd77]

@axic Ok, this would allow for in-parallel Constantinople test runs.

There is no way of not adding Constantinople to the supportedHardforks list if tests should be able to run. In my opinion this is ok if it's clearly documented. If you don't like that, there is still the alternative that people have to re-add this on every Constantinople PR, which would be more inconvenient (at the end it would have to be removed again before merging), but possible.

[holgerd77]

@axic No way of "not adding" of course, have updated this in the comment.

[holgerd77]

@axic Hmm, I think I'll rename this from test_state_dev to test_state_constantinople, then it is more transparent why this is failing and we don't have to re-explain this all the time to external contributors.

[coveralls]

Coverage remained the same at 85.531% when pulling 25bbd1c on add-constantinople-state-test-runs into 41b5a0b on master.

[axic]

I guess we can select test_state_constantinople as allowed to fail in github.

[axic]

I see that's already done. I think the only comment is that I'd rename test_state to test_state_byzantium.

[holgerd77]

Review done informally by @axic, merged.