Missing without_subscribes_to or without_notifies

[fe80]

Use Case

Hello,

Sometimes we disable notification of service or a exec resource. That can be useful to check if a subscribes or an notifies is correctly absent.

Describe the Solution You Would Like

contain_service(title).without_subscribes_to("File[/etc/systemd/system/#{title}]")

Describe Alternatives You've Considered

voxpupuli/puppet-systemd#295 (comment)

it { is_expected.not_to contain_service(title).with_subscribes_to("File[/etc/systemd/system/#{title}]")

Additional Context

This issue is related with voxpupuli/puppet-systemd#295