Prepare a 4.2.2-2 closing #921751 (CVE-2019-7653) et al
From the changelog:
[ Christian Amsüss ]
* tools:
- Use easy_install provided scripts (CVE-2019-7653, closes: #921751)
- Use Python 3
* d/control: Remove retired Olivier Berger from uploaders (closes: #917913)
* d/patches: Acknowledge that pyparsinglatest.patch is not required any more
* Add bsddb3 and rdflib-jsonld to test dependencies
- Disable broken tests for rdflib-jsonld at build time