Add a DefaultQueue type alias to remove the need to use sp_api::TransactionFor (#6761)

* Add DefaultQueue

* Add DefaultImportQueue to the top level of sp-consensus

substrate/bin/node-template/node/src/service.rs

@@ -24,7 +24,7 @@ type FullSelectChain = sc_consensus::LongestChain<FullBackend, Block>;
 
 pub fn new_partial(config: &Configuration) -> Result<sc_service::PartialComponents<
 	FullClient, FullBackend, FullSelectChain,
-	sc_consensus_aura::AuraImportQueue<Block, FullClient>,
+	sp_consensus::DefaultImportQueue<Block, FullClient>,
 	sc_transaction_pool::FullPool<Block, FullClient>,
 	(
 		sc_finality_grandpa::GrandpaBlockImport<FullBackend, Block, FullClient, FullSelectChain>,