Double timestamps in runtime action logging

In my runtime action code, I am doing this:
```
const aioLogger = require('@adobe/aio-lib-core-logging')('@adobe/aio-app-myapps/resolver', { provider: 'debug', level: 'debug' })
...
// and later
aioLogger.debug('resolver got a request')
```
When I look at the logs, I see this:
```
2020-03-10T22:35:04.802Z stdout: 2020-03-10T22:35:04.802Z @adobe/aio-app-myapps/resolver:debug resolver got a request
```

With the double time stamp, plus the stream name, plus a verbose debug namespace, there are 100 char before the message.