Config overhaul: define current config version as version 2

[josecelano]

Parent issue: #401
Relates to: #401 (comment)

Internally, the current version of the new configuration after the overhaul is version 1. I intended to start versioning from this version, but after a team discussion, we have decided to use version 2 even if we don't support version 1 anymore.

It was defined in the issues as version 2.

NOTE: We will not support version 1, although we can refer to it.