DS-1633 Sherpa/Romeo integration in the submission upload step
Renamed the sherpa/romeo activation parameter

Renamed to webui.xxx so to avoid configuration changes when the features will
become available also in XMLUI
Update the sherpa romeo response to the full response versions schema

Introduced support for publicher policies and restrictions about the pdf version
Merge pull request #283 from abollini/DS-1633

DS-1633 Sherpa/Romeo integration in the submission upload step