[DRE-maint] berkshelf-api is marked for autoremoval from testing

[Debian testing autoremoval watch]

berkshelf-api 2.1.3-1 is marked for autoremoval from testing on 2016-08-24

It (build-)depends on packages with these RC bugs:
830820: ruby-grape-msgpack: FTBFS: grape/msgpack.rb:39:in `<top (required)>': uninitialized constant Grape::Formatter::Base (NameError)