(change) Add serializable configuration layer for redis options in struct describing configuration of retriever

[DeamonDev]

Motivation

Currently the struct RetrieverConf contains the field RedisOptions *redis.Option which is not serializable into JSON since it contains function fields. Maybe we should create some "serializable layer" ? In that case it would be easier pass command line configuration properties in cmd/cli package (see: #4025 for ongoing implementation)

Requirements

Discussion on that matter

[thomaspoignant]

@DeamonDev thanks for this issue, I think you are right we should probably have a serializable layer, my only worries is having to support a layer on GOFF side.

But that being said I don't see any other way to do it. So having something simple like bellow would be ok.
Do you think we need more than that?

type RedisConfig struct {
    Addr     string `json:"addr"`
    Username string `json:"username"`
    Password string `json:"password"`
    DB       int    `json:"db"`
}