Incorrect logging level in AWS DAX GO SDK

[adriantam]

We wanted to track request retries and errors in our log by setting log level to aws.LogDebugWithRequestRetries and aws.LogDebugWithRequestErrors

aws.NewConfig().WithLogger(logger).WithLogLevel(aws.LogDebugWithRequestRetries | aws.LogDebugWithRequestErrors)

However, this will add noises in our log as it also log things like dax health check passing etc.

The SDK log should have the appropriate level so that logging error cases will not require logging normal operations.