decl_storage as a proc_macro (#1176)

* `decl_storage` parsing of the macro (TODO change tool crate structure)

* Start formatting, for now use inner macro.
Still missing optional formating last part (genesis ...).

* Calling extra genesis macro

* decl_storage lines parsing.

* genesis macro as quote (need some cleaning reorg)

* dirty $crate substitute

* proc crate reorg.

* PR impl : skip usage of phantom data, it only applies in test and
council (others required it).

* Remaining macro of decl_storage, warning stringify behave sometime
oddly.

* Formatting code and some cleaning.

* Include line parsing to main struct (cannot use existing macro anymore).

* Remove genesis phantom data when there is already a field with type
parameter.

* Revert wasm files

* Remove old version of `decl_storage`.

* Fix false positive for phantom trait (additional type check on config
build).

* slight changes:
- return token errors instead of panic
- do not use useless intermediate vec

* Update srml/support/procedural/tools/derive/src/lib.rs

remove indent

Co-Authored-By: cheme <emericchevalier.pro@gmail.com>

* Switch iterations to fold, remove unused import.

substrate/node/executor/src/lib.rs

@@ -235,12 +235,10 @@ mod tests {
 				transfer_fee: 0,
 				creation_fee: 0,
 				reclaim_rebate: 0,
-				_genesis_phantom_data: Default::default(),
 			}),
 			session: Some(SessionConfig {
 				session_length: 2,
 				validators: vec![One.to_raw_public().into(), Two.to_raw_public().into(), three],
-				_genesis_phantom_data: Default::default(),
 			}),
 			staking: Some(StakingConfig {
 				sessions_per_era: 2,
@@ -254,7 +252,6 @@ mod tests {
 				current_offline_slash: 0,
 				current_session_reward: 0,
 				offline_slash_grace: 0,
-				_genesis_phantom_data: Default::default(),
 			}),
 			democracy: Some(Default::default()),
 			council_seats: Some(Default::default()),
@@ -269,7 +266,6 @@ mod tests {
 					(Bob.to_raw_public().into(), 1),
 					(Charlie.to_raw_public().into(), 1),
 				],
-				_genesis_phantom_data: Default::default(),
 			}),
 		}.build_storage().unwrap().0)
 	}