test: Bump timeouts to avoid valgrind failures

test/functional/wallet_multiwallet.py

@@ -24,6 +24,7 @@ class MultiWalletTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 2
+        self.rpc_timeout = 120
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()