[qa] fundrawtx: Fix shutdown race

Author: MarcoFalke

test/functional/fundrawtransaction.py

@@ -452,7 +452,7 @@ def run_test(self):
         self.stop_node(2)
         self.stop_node(3)
         self.nodes[1].encryptwallet("test")
-        self.nodes.pop(1)
+        bitcoind_processes[1].wait(timeout=BITCOIND_PROC_WAIT_TIMEOUT)
 
         self.nodes = self.start_nodes(self.num_nodes, self.options.tmpdir)
         # This test is not meant to test fee estimation and we'd like