Preparation for 3.2.1

[martinsumner]

There are a number of minor issues/preferences to be resolved as part of preparation for a 3.2.1-nhs release:

• The suppression of the break signal does not set the emulator flag correctly.
• make package does not work directly for debian, a compile stage is required first as otherwise the linking of _build does not work as expected.
• The debian riak.riak.service file does not my default set a sensible value for ulimit.
• The dev_vars.config.src file sets log_level to debug; and this generates excessive noise when running riak_test.
• There are a significant number of lintian warnings/errors on make package, and the errors are not obviously resolvable. As these errors have been ignored across releases - they should either be specifically suppressed, or the no-lintian option be added to debuild.
• The version of rebar3/relx must be compatible with OTP24. Question over whether it should be OTP22-24 compatible or OTP24-26.

[martinsumner]

Also an issue with this error:

chown: changing ownership of '/run/riak': Operation not permitted

If one starts with systemd, but then attempts to call a riak command without sudo