zaptest: Add possibility to pass zap.Option's

[iaroslav-ciupin]

Synopsis

zaptest.NewLogger gives you possibility to set logging level using zaptest.Level(enab zapcore.LevelEnabler). It would be great to optionally add caller to test logger using something like:

logger := zaptest.NewLogger(t, zaptest.WrapOptions(zap.AddLogger(), ...))

This should result in logging caller like so:

...
42: log.Info("received work order") 
43: // logs "INFO    zaptest/logger_test.go:42    received work order"

Pull request with suggested change: #610

[iaroslav-ciupin]

Hi @akshayjshah , @prashantv ! Can you please have a look at this proposal(and PR with corresponding implementation) ? Thanks in advance.