fix beacon chain / http_api tests

beacon_node/http_api/tests/status_tests.rs

@@ -134,6 +134,9 @@ async fn el_error_on_new_payload() {
     assert!(!api_response.is_optimistic);
     assert!(!api_response.is_syncing);
 
+    // sleep for just past the cache TTL
+    tokio::time::sleep(std::time::Duration::from_secs(12)).await;
+
     // Processing a block successfully should remove the status.
     mock_el.server.set_new_payload_status(
         block_hash,