Url issue

Fix the bug for important sub-metrics
I think we should do with lambda so it's clearer and easier to add/remove with less room for error with typos.

Various suggestions on writing:

```python
csv_data = ','.join([sub_metric] + map(lambda x: str(round(x, 2)), [stats_data['mean'], stats_data['std'],
                    percentile_data[50], percentile_data[75], percentile_data[90], percentile_data[95],
                    percentile_data[99], stats_data['min'], stats_data['max']]))
```

Put map on next line and align metrics:
```python
csv_data = ','.join([sub_metric] +
                    map(lambda x: str(round(x, 2)), [stats_data['mean'], stats_data['std'], percentile_data[50],
                                                    percentile_data[75], percentile_data[90], percentile_data[95],
                                                    percentile_data[99], stats_data['min'], stats_data['max']]))
```

Separate structure:
```python
row = [ stats_data['mean'], stats_data['std'], percentile_data[50], percentile_data[75], percentile_data[90],
        percentile_data[95], percentile_data[99], stats_data['min'], stats_data['max'] ]
csv_data = ','.join([sub_metric] + map(lambda x: str(round(x, 2)), row))
```