pytest: fix spurious failure in test_local_basepoints_cache.

Change the address in the canned db: it seems we won the lottery and
l1 connected, and got an error!

```
 E           ValueError:
 E           Node errors:
 E            - lightningd-1: had warning messages
 E           Global errors:
...
 lightningd-1: 2021-04-07T02:44:53.579Z DEBUG   022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59-channeld-chan#1: peer_out WIRE_CHANNEL_REESTABLISH
 lightningd-1: 2021-04-07T02:44:53.579Z DEBUG   022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59-channeld-chan#1: peer_in WIRE_GOSSIP_TIMESTAMP_FILTER
 lightningd-1: 2021-04-07T02:44:53.580Z DEBUG   022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59-channeld-chan#1: peer_in WIRE_ERROR
 lightningd-1: 2021-04-07T02:44:53.580Z INFO    022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59-chan#1: Peer transient failure in CHANNELD_NORMAL: channeld WARNING: error channel fdeb1ea12e02aa043f66ba581e969a1882d21142b19429995c6733bb71070bb6: Multiple channels unsupported
 lightningd-1: 2021-04-07T02:44:53.580Z DEBUG   022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59-chan#1: Will try reconnect in 60 seconds
```

So I changed the port in the db to "1" which will never succeed:

```
sqlite> .dump peers
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE peers (  id INTEGER, node_id BLOB UNIQUE, address TEXT, PRIMARY KEY (id));
INSERT INTO peers VALUES(1,X'022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59','127.0.0.1:38723');
COMMIT;
sqlite> UPDATE peers SET address="127.0.0.1:1"
   ...> ;
sqlite> .dump peers
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE peers (  id INTEGER, node_id BLOB UNIQUE, address TEXT, PRIMARY KEY (id));
INSERT INTO peers VALUES(1,X'022d223620a359a47ff7f7ac447c85c46c923da53389221a0054c11c1e3ca31d59','127.0.0.1:1');
COMMIT;
sqlite>
```

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell