On debian 8.5 cloudooo refuses to start with:

    ./parts/libreoffice-bin/program/soffice.bin: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by ../parts/mesa/lib/libGL.so.1)

some more info:

    # dpkg  -S  /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.20
    libstdc++6:amd64: /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.20

Create a Software Release for Replication Manager 2.1

https://github.com/signal18/replication-manager

See merge request nexedi/slapos!719

This reverts commit ef5aca54.

software-shared.cfg is used on master from scalability tests, let's keep
it for now.

Install setuptools_scm before jsonschema (which has it in setup_requires) so that the version can be controlled by buildout

See merge request !768