[tests] Move deterministic address import to setup_nodes

This requires a small changes to a few tests, but means that
deterministic addresses will always be imported (unless setup_nodes
behaviour is explicitly overridden).

test/functional/feature_dbcrash.py

@@ -69,6 +69,7 @@ class ChainstateWriteCrashTest(BitcoinTestFramework):
     def setup_network(self):
         self.add_nodes(self.num_nodes, extra_args=self.extra_args)
         self.start_nodes()
+        self.import_deterministic_coinbase_privkeys()
         # Leave them unconnected, we'll use submitblock directly in this test
 
     def restart_node(self, node_index, expected_tip):