Updated Chefspec tests to Chefspec 3
Renamed node['ntp']['listen'] to node['ntp']['listen_address']
- Add Gentoo support (COOK-3887)
Rename ['ntp']['sync_clock'] to ['ntp']['force_sync_clock']
- Incorporate apparmor.rb recipe into linux.rb recipe, remove separate recipe
- Move OS-specific logic into separate recipes
- Move windows_client recipe to just windows