Adjust Amarisoft-related promises and tests to treat `data` in `*.json.log` as JSON

Hello up there,

This merge-requests primarily adjusts promises code to treat `data` field in `*.json.log` as real JSON. It is counterpart to slapos!1447 .

- patch 1 syncs tests to current state of ORS SR;
- patch 2 removes replacement of `'` with `"` in input data;
- patch 3 removes UTF-8 decoding when input is fed to json.loads.

Please see individual patches for details.

Kirill

/cc @jhuge, @lu.xu, @tomo, @xavier_thompson, @Daetalus, @jerome
/reviewed-on !120 and slapos!1447