software/ors-amarisoft: Move lopcomm to private repository

Hello,

The implementation for Lopcomm needs to be moved to private.
Instead of making the private lopcomm repository extended from the URL of the public ors-amarisoft to avoid code redundancy. e.g.

[buildout]
extends = https://lab.nexedi.com/nexedi/slapos/-/raw/TAG/software/ors-amarisoft/software.cfg

I will fork the slapos repository and make customization.

/cc @jhuge @kirr @tomo