Implement a proper generic resolution in decl_storage! (#2913)

* Add failing test case

* move storage maps to blake2_128 (#2268)

* remove default hash, introduce twox_128 and blake2

* use blake2_128 & create ext_blake2_128

* refactor code

* add benchmark

* factorize generator

* fix

* parameterizable hasher

* some fix

* fix

* fix

* fix

* metadata

* fix

* remove debug print

* map -> blake2_256

* fix test

* fix test

* Apply suggestions from code review

Co-Authored-By: thiolliere <gui.thiolliere@gmail.com>

* impl twox 128 concat (#2353)

* impl twox_128_concat

* comment addressed

* fix

* impl twox_128->64_concat

* fix test

* Fix compilation and cleanup some docs

* Lol

* Remove traits from storage types that are not generic

* Get instance test almost working as wanted

* Make `srml-support-test` compile again :)

* Fixes test of srml-support

* Fix compilation

* Break some lines

* Remove incorrect macro match arm

* Integrates review feedback

* Update documentation

* Fix compilation

substrate/node-template/src/chain_spec.rs

@@ -93,7 +93,6 @@ fn testnet_genesis(initial_authorities: Vec<AuthorityId>, endowed_accounts: Vec<
 		system: Some(SystemConfig {
 			code: include_bytes!("../runtime/wasm/target/wasm32-unknown-unknown/release/node_template_runtime_wasm.compact.wasm").to_vec(),
 			changes_trie_config: Default::default(),
-			_genesis_phantom_data: Default::default(),
 		}),
 		aura: Some(AuraConfig {
 			authorities: initial_authorities.clone(),