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

[Debian testing autoremoval watch]

capistrano 3.2.1-1 is marked for autoremoval from testing on 2015-09-23

It is affected by these RC bugs:
795724: capistrano: FTBFS: Failure/Error: expect(Configuration.env.fetch(:test)).to be_true

It (build-)depends on packages with these RC bugs:
795118: ruby-sshkit: FTBFS: SSHKit::TestConfiguration#test_backend flaky