Paul Hauner e5d9d6179f Add info about valid deposit count to logs (#1391)
## Issue Addressed

NA

## Proposed Changes

Adds a `valid_deposits` field to the logs whilst waiting for genesis:

```
Jul 25 11:02:25.631 INFO Waiting for more deposits               valid_deposits: 3085, total_deposits: 3188, min_genesis_active_validators: 16384, service: beacon
```

In this example we can see there are `3188` deposits, but only `3085` have valid signatures.

## Additional Info

NA
2020-07-25 04:44:10 +00:00
..
2020-07-06 11:55:56 +10:00