jenkins_slave_jnlp resource creation is not compatible with Ruby3.1

[anatolijd]

Description

jenkins_slave_jnlp breaks recipe run when executed on cinc-18 client (Ruby3.1). slave_jar_url method is not executed and remote_resource has no source defined.

To fix it, I just moved slave_jar_url evaluation outside the resource declaration scope.

file actions notify undefined service name, this breaks recipe execution. 2nd commit removes runit services before starting new service