rotate log file: 0chainBlobber-sdk.log

[boddumanohar]

currently blobber generates 2 log files:

1. 0chainBlobber.log
2. 0chainBlobber-sdk.log

The first one is rotated as per the configuration defined here:

blobber/code/go/0chain.net/core/logging/logger.go

Lines 109 to 120 in 54b3c2a

	func getWriteSyncer(logName string) zapcore.WriteSyncer {
	var ioWriter = &lumberjack.Logger{
	Filename: logName,
	MaxSize: 10, // MB
	MaxBackups: 3, // number of backups
	MaxAge: 28, //days
	LocalTime: true,
	Compress: false, // disabled by default
	}
	_ = ioWriter.Rotate()
	return zapcore.AddSync(ioWriter)
	}

But the other one is not rotated and it keeps growing very quickly. Around 200 MB per day.

The goal is to configure some setting to rotate the file 0chainBlobber-sdk.log so that we can deterministic about storage