Adder collator improvements (#1896)

* Fixes bug that collator wasn't sending `Declare` message

* Set authority discovery config

* Fixes bug that collator wasn't sending `Declare` message

* Adds real overseer feature and makes the wasm_validation fail with a
proper error

* Adds README

* Remove debug stuff

* Add feature

* Make adder collator use the correct parent when building a new block

polkadot/parachain/test-parachains/adder/collator/src/main.rs

@@ -23,6 +23,7 @@ use polkadot_node_primitives::CollationGenerationConfig;
 use polkadot_primitives::v1::{CollatorPair, Id as ParaId};
 use test_parachain_adder_collator::Collator;
 use sp_core::{Pair, hexdisplay::HexDisplay};
+use std::time::Duration;
 
 const PARA_ID: ParaId = ParaId::new(100);
 
@@ -47,6 +48,11 @@ fn main() -> Result<()> {
 					config,
 					polkadot_service::IsCollator::Yes(collator_key.public()),
 					None,
+					Some(sc_authority_discovery::WorkerConfig {
+						query_interval: Duration::from_secs(1),
+						query_start_delay: Duration::from_secs(0),
+						..Default::default()
+					}),
 				)?;
 				let mut overseer_handler = full_node.overseer_handler
 					.expect("Overseer handler should be initialized for collators");