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

[Debian testing autoremoval watch]

berkshelf 4.3.5-2 is marked for autoremoval from testing on 2017-08-06

It is affected by these RC bugs:
867650: berkshelf: FTBFS: ERROR: Test "ruby2.3" failed: Did you mean? Berkshelf::NullFormatter (NameError)

It (build-)depends on packages with these RC bugs:
867656: ruby-mixlib-install: FTBFS: ERROR: Test "ruby2.3" failed: Failure/Error: res = http.request(request)