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/runtime/src/lib.rs

@@ -183,7 +183,7 @@ construct_runtime!(
 		NodeBlock = opaque::Block,
 		UncheckedExtrinsic = UncheckedExtrinsic
 	{
-		System: system::{default, Config<T>},
+		System: system::{Module, Call, Storage, Config, Event},
 		Timestamp: timestamp::{Module, Call, Storage, Config<T>, Inherent},
 		Aura: aura::{Module, Config<T>, Inherent(Timestamp)},
 		Indices: indices::{default, Config<T>},