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

[Debian testing autoremoval watch]

berkshelf-api 2.2.0-1 is marked for autoremoval from testing on 2017-09-03

It (build-)depends on packages with these RC bugs:
869164: ruby-net-scp: ruby-net-scp FTBFS: test failures
869174: ruby-net-sftp: FTBFS: ERROR: Test "ruby2.3" failed:   => 142: assert_raises(ArgumentError) { sftp.download("/path/to/remote", StringIO.new, :recursive => true) }
869175: ruby-specinfra: FTBFS: can't satisfy 'net-ssh (< 4.0, >= 2.7)', already activated 'net-ssh-4.1.0' (Gem::LoadError)
869177: ruby-serverspec: FTBFS: can't satisfy 'net-ssh (< 4.0, >= 2.7)', already activated 'net-ssh-4.1.0' (Gem::LoadError)
869179: chef: FTBFS: Could not find 'net-ssh' (< 4.0, >= 2.9) - did find: [net-ssh-4.1.0] (Gem::LoadError)