version: mark 2.2.0 beta (#9820)

* version: mark 2.2.0 beta

* ci: remove failing tests for android, windows, and macos (#9788)

* ci: remove failing tests for android, windows, and macos

* ci: restore android build jobs

* Move state root verification before gas used (#9841)

* Classic.json Bootnode Update (#9828)

* fix: Update bootnodes list to only responsive nodes

* feat: Add more bootnodes to classic.json list

* feat: Add retested bootnodes

* Implement NoProof for json tests and update tests reference (replaces #9744) (#9814)

* Update test reference.
Block test are really not working so I disabled a few by commenting
directly in source.

* Move ethtest commit cursor.

* Implements 'NoProof' engine from https://github.com/ethereum/tests/issues/464 .

Since tests has been regenerated those one were failing on block
difficulty check.

Update ethereum/tests, waiting for cost fix (block test are still
commented).

* Update tests submodule reference to latest (all test passing except an
identified case).
Fix block reward of constantinople json.

* Restore broken test by using old json tests files.

* Use CanonNoSeal instead of a custom engine, still have to include some
additional tests code.

* Gas upper limit check in json_chain test was bad, moving the test to
verification, the test is running in `verify_header_param`.
Note that test was previously only for ethash, and now for any engine.

* Restore old behavior (gas uper limit only for ethash engine), at the
cost of an additional trait method.

* Proper rpc test fix.

* Update tests submodule, add SStore bug tests.

* Fix json issue tabulation.
Update tests submodule to latest master (lot of new sstore tests
passing)

* Switch ethereum/tests to tag 6.0.0-beta.1 (no tests changes from latest
synch).

* Display hex with separator, use indirection instead of clone for copy
types.

json/src/blockchain/mod.rs

@@ -27,6 +27,7 @@ pub mod test;
 pub use self::account::Account;
 pub use self::block::Block;
 pub use self::blockchain::BlockChain;
+pub use self::blockchain::Engine;
 pub use self::header::Header;
 pub use self::state::State;
 pub use self::test::Test;