[server] GORM to sqlx?

[jmaister]

Anarchy0904 proposed to make this change.

@jordiburgos I saw discussions about the ORM and GORM being one possibility. We have been using GORM in our project from more than a year now. One major problem with it is that in the query conditions you refer to the database schema fields and no the Go struct fields which creates dependency outside the control of the code.
As much as I prefer ORM for Rest APIs and CRUD intensive application at this point I would suggest something like sqlx that helps in the hydration and not building too much dependency on a third library also building exactly what is required instead.