Default logging shouldn't be sampled

[vprithvi]

Logs are sampled, and any more than ~100 logs lines per second would be dropped.
Change this so that all logs are output.

[jpkrohling]

Is this still the case?

[yurishkuro]

that's the default in zap, so probably still an issue

[jpkrohling]

Looks like we just need to find the places we call zap.NewProductionConfig() and set its Sampling property to nil:

https://github.com/uber-go/zap/blob/badef736563f8135e0add3232b06f58656da03c8/config.go#L68-L69

Looks like a good first issue to me :-)

[psinghal20]

Hi! If this issue is still up for grabs, I would love to work on this.

[jpkrohling]

@psinghal20 it's yours!