248: Wait for wallet to catch up instead of block generation r=thomaseizinger a=da-kami
The monero harness wallet always starts a miner that mines new blocks every second.
This can conflict with additionally triggering block generation and cause this error:
```
monero_rpc::rpc::monerod: generate blocks response: {
"error": {
"code": -7,
"message": "Block not accepted"
},
"id": "1",
"jsonrpc": "2.0"
}
```
See error in CI run here: https://github.com/comit-network/xmr-btc-swap/runs/2001131193
Since the miner is generating blocks anyway we can wait for the wallet to catch up.
Refresh is done upon querying the balance, thus the refresh calls were removed.
---
Note: we could also opt for starting the miner optionally. This would make this test more efficient, but is a more intrusive change, thus I opted for this fix for now.
Co-authored-by: Daniel Karzel <daniel@comit.network>