Close eth node after usage (#1741)

hive_integration/nodocker/engine/engine_env.nim

@@ -152,9 +152,13 @@ proc newEngineEnv*(conf: var NimbusConf, chainFile: string, enableAuth: bool): E
     client : client,
     sync   : sync
   )
+  
+proc close(node: EthereumNode) =
+  node.stopListening()
+  waitFor node.listeningServer.closeWait()
 
 proc close*(env: EngineEnv) =
-  env.node.stopListening()
+  env.node.close()
   env.sync.stop()
   waitFor env.client.close()
   waitFor env.sealer.stop()

hive_integration/nodocker/engine/withdrawal_tests.nim

@@ -256,7 +256,7 @@ let wdTestList* = [
       "- Wait for sync, which include syncing a pre-Withdrawals block, and verify withdrawn account's balance\n",
     run: specExecute[SyncSpec],
     spec: SyncSpec(
-      timeoutSeconds: 300,
+      timeoutSeconds:  50,
       wdForkHeight:    2,
       wdBlockCount:    128,
       wdPerBlock:      MAINNET_MAX_WITHDRAWAL_COUNT_PER_BLOCK,