Fix handling of timeout error in the tests (#1199)
Fix handling of timeout error in the tests (#1199)

Old error message:
```
edb.server.cluster.ClusterError: could not connect to edgedb-server within -0.22 seconds
```
New error message:
```
edb.server.cluster.ClusterError: could not connect to edgedb-server within 30 seconds
```
edgedb/edgedb,edgedb/edgedb,edgedb/edgedb