Check block CLI command (#4240)

* Check block operation

* Update client/cli/src/lib.rs

* Update client/cli/src/params.rs

substrate/client/network/src/test/block_import.rs

@@ -41,6 +41,7 @@ fn prepare_good_block() -> (TestClient, Hash, u64, PeerId, IncomingBlock<Block>)
 		justification,
 		origin: Some(peer_id.clone()),
 		allow_missing_state: false,
+		import_existing: false,
 	})
 }
 

substrate/client/network/src/test/mod.rs

@@ -99,6 +99,7 @@ impl<B: BlockT> Verifier<B> for PassThroughVerifier {
 			auxiliary: Vec::new(),
 			fork_choice: ForkChoiceStrategy::LongestChain,
 			allow_missing_state: false,
+			import_existing: false,
 		}, maybe_keys))
 	}
 }