Do not fail if state is not started

[jaypee-solutions]

When using node_exporter_state stopped the role will fail,
while nodeexporter is expected to not respond.

[fabricesemti80]

I would like to request this also.

    - role: geerlingguy.node_exporter
      become: true
      node_exporter_state: stopped
      node_exporter_enabled: false

it uninstalls the service indeed, getting:

 systemctl status node_exporter
● node_exporter.service - NodeExporter
     Loaded: loaded (/etc/systemd/system/node_exporter.service; disabled; vendor preset: enabled)
     Active: inactive (dead)

but it indeed errors out the TASK [geerlingguy.node_exporter : Verify node_exporter is responding to requests.] task (as it is expected not running)

[Cedric-Froehner]

Not trying to rush here or anything, but this pull request is on "planned" since 2022. 😉 I would really love to see this feature added.
Also, I would love to add onto it with a general "test_node_exporter" flag, since there are use cases where the node exporter state is started, but the web check will still fail (for example when authentication is required by a node_exporter config).

[Cedric-Froehner]

My last comment also should have referenced issue #28