This commit does a few things at once:

- Updates the tests to contain the latest data from ethereum/tests repo.
- Enables Constantinople state tests. This is needed to be able to
  fuzz-test the evm with constantinople rules.
- Fixes the error in opSAR that we've known about for some time. I was
  kind of saving it to see if we hit upon it with the random test
  generator, but it's difficult to both enable the tests and have the
  bug there -- we don't want to forget about it, so maybe it's better
  to just fix it.

This is an attempt to fix the flaky consensus/ethash tests under macOS.

This fixes an issue with websocket ping frame handling. 

miner: track uncles more aggressively

cmd, core, eth, miner, params: configurable gas floor and ceil

* consensus, miner: stale block supporting

* consensus, miner: refactor seal signature

* cmd, consensus, eth: add miner noverify flag

* cmd, consensus, miner: polish

miner: differentiate between uncle and lost block

* miner: commit state which is relative with sealing result

* consensus, core, miner, mobile: introduce sealHash interface

* miner: evict pending task with threshold

* miner: go fmt

cmd, eth: clean up miner startup API, drop noop config field

cmd, core, miner: add --txpool.locals and priority mining