disabled_services should be stopped too

[igalic]

Describe the bug

Disabling a service does not guarantee that the service will be stopped.
In the case of systemd it even leads to inconsistencies that need to be addressed in the service provider, see: https://github.com/puppetlabs/puppet/blob/5.5.x/lib/puppet/provider/service/systemd.rb#L37-L48

# This helper ensures that the enable state cache is always reset
# after a systemctl enable operation. A particular service state is not guaranteed
# after such an operation, so the cache must be emptied to prevent inconsistencies
# in the provider's believed state of the service and the actual state.

Expected behavior

I would expect this module to stop disabled services.

Actual behavior

Services are left running until a reboot of the machine.

[mcgege]

fixed with #226