Add set custom header to Seedling Runtime (#846)

* before adding seedling client side

* seedling runtime compiles

* create seedling spec script added

* seedling node & BaseCallFilter fixes

* update AllPalets

* formatting

* CallFilter + SignedExtra + AccountData fix

* XCM removed

* cleanup

* solo-to-para pallet added & before testing

* fix runtime upgrade method

* soloToPara pallet + set header

* clean up

* clean up 2

* signed extension check sudo added

* fmt + cleanup

* Refac code and fixes

* fmt

* Update pallets/solo-to-para/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update pallets/solo-to-para/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update pallets/solo-to-para/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* small fixes

* OnValidationData used

* small changes

* Update pallets/solo-to-para/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update pallets/solo-to-para/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update pallets/solo-to-para/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* OnValidationData replaced by OnSystemEvent

* fmt + cargo fix

* disable-default-bootnodes for seedling script

Co-authored-by: Ricardo Rius <ricardo@parity.io>
Co-authored-by: Ricardo Rius <9488369+riusricardo@users.noreply.github.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

primitives/core/Cargo.toml

@@ -18,7 +18,6 @@ polkadot-primitives = { git = "https://github.com/paritytech/polkadot", default-
 polkadot-core-primitives = { git = "https://github.com/paritytech/polkadot", default-features = false, branch = "master" }
 
 # Other dependencies
-impl-trait-for-tuples = "0.2.1"
 codec = { package = "parity-scale-codec", version = "2.3.0", default-features = false, features = [ "derive" ] }
 
 [features]

primitives/core/src/lib.rs

@@ -139,12 +139,6 @@ pub enum ServiceQuality {
 	Fast,
 }
 
-/// A trait which is called when the validation data is set.
-#[impl_trait_for_tuples::impl_for_tuples(30)]
-pub trait OnValidationData {
-	fn on_validation_data(data: &PersistedValidationData);
-}
-
 /// The parachain block that is created by a collator.
 ///
 /// This is send as PoV (proof of validity block) to the relay-chain validators. There it will be