scripted-diff: validateaddress to getaddressinfo in tests

Change all instances of validateaddress to getaddressinfo since it seems that
no test actually uses validateaddress for actually validating addresses.

-BEGIN VERIFY SCRIPT-
find ./test/functional -path '*py' -not -path ./test/functional/wallet_disable.py -not -path ./test/functional/rpc_deprecated.py -not -path ./test/functional/wallet_address_types.py -exec sed -i'' -e 's/validateaddress/getaddressinfo/g' {} \;
-END VERIFY SCRIPT-

test/functional/wallet_basic.py

@@ -317,7 +317,7 @@ class WalletTest(BitcoinTestFramework):
         self.nodes[1].importaddress(address_to_import)
 
         # 3. Validate that the imported address is watch-only on node1
-        assert(self.nodes[1].validateaddress(address_to_import)["iswatchonly"])
+        assert(self.nodes[1].getaddressinfo(address_to_import)["iswatchonly"])
 
         # 4. Check that the unspents after import are not spendable
         assert_array_result(self.nodes[1].listunspent(),