Update state tests execution model (#9440)

* Update & fix JSON state tests.

* Update tests to be able to run ethtest at
021fe3d410773024cd5f0387e62db6e6ec800f32.

- Touch user in state
- Adjust transaction tests to new json format

* Switch to same commit for submodule ethereum/test as geth (next includes constantinople changes).
Added test `json_tests::trie::generic::TrieTests_trieanyorder` and a few
difficulty tests.

* Remove trietestnextprev as it would require to parse differently and
implement it.

* Support new (shitty) format of transaction tests.

* Ignore junk in ethereum/tests repo.

* Ignore incorrect test.

* Update to a later commit

* Move block number to a constant.

* Fix ZK2 test - touched account should also be cleared.

* Fix conflict resolution

json/src/spec/spec.rs

@@ -21,6 +21,21 @@ use serde_json;
 use serde_json::Error;
 use spec::{Params, Genesis, Engine, State, HardcodedSync};
 
+/// Fork spec definition
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Deserialize)]
+pub enum ForkSpec {
+	EIP150,
+	EIP158,
+	Frontier,
+	Homestead,
+	Byzantium,
+	Constantinople,
+	EIP158ToByzantiumAt5,
+	FrontierToHomesteadAt5,
+	HomesteadToDaoAt5,
+	HomesteadToEIP150At5,
+}
+
 /// Spec deserialization.
 #[derive(Debug, PartialEq, Deserialize)]
 pub struct Spec {