gnosis / dex-services / 4714

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travis-pro

only use one root logger (#1303)

This PR changes the filters to only use one root logger so we don't get spammed with logs for each request.

### Test Plan

Run the price estimator:
```
$ cargo run -p price-estimator -- --orderbook-file target/orderbook-file-mainnet --log-filter warp::filters::log=info
```

In a separate terminal send the following resquests:
```
$ curl -s 'http://localhost:8080/' | jq '.message'
"invalid url path"
$ curl -s 'http://localhost:8080/api/v1/markets/9-7/estimated-buy-amount/1?atoms=false' | jq '.message'
"request with atoms=true for token we don't have erc20 info for"
$ curl -s 'http://localhost:8080/api/v1/markets/9-DAI/estimated-buy-amount/1?atoms=false' | jq '.message'
"token symbol or address not found"
```

And check the logs:
```
2020-08-12T15:13:48.492Z INFO [warp::filters::log] 127.0.0.1:47940 "GET / HTTP/1.1" 404 "-" "curl/7.69.1" 82.229µs
2020-08-12T15:14:00.778Z INFO [warp::filters::log] 127.0.0.1:47944 "GET /api/v1/markets/9-7/estimated-buy-amount/1 HTTP/1.1" 400 "-" "curl/7.69.1" 11.049296ms
2020-08-12T15:14:10.123Z INFO [warp::filters::log] 127.0.0.1:47948 "GET /api/v1/markets/9-DAI/estimated-buy-amount/1 HTTP/1.1" 400 "-" "curl/7.69.1" 343.622µs
```

12325 of 48824 branches covered (25.24%)

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