[DRE-maint] ruby-compat-resource is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-compat-resource 12.10.5-1 is marked for autoremoval from testing on 2017-09-16

It (build-)depends on packages with these RC bugs:
869179: chef: FTBFS: Could not find 'net-ssh' (< 4.0, >= 2.9) - did find: [net-ssh-4.1.0] (Gem::LoadError)