Reload daemons for Logstash restart (#347)

Reload unit files when restart Logstash via handler. We're running the
handler for upgrades of the package, not only when changing
configuration.

This might make reloads a bit slower but it seems to be the only chance
to deal with changes in the Logstash unit file. We're not managing this
file with the collection, so changing it manually is fine.

If someone does, we need to reload the unit file.

We *could* introduce a separate handler. One for upgrades of the package
that does the daemon reload and another without reload for regular
configuration changes. @frankhetterich @afeefghannam89 @martialblog what
do you think? I went for one handler which does it all but that's just a
suggestion so far.

Thank you, @frankhetterich for the bug report and the suggested fix.

fixes #342

roles/logstash/handlers/main.yml

@@ -4,6 +4,7 @@
   ansible.builtin.service:
     name: logstash
     state: restarted
+    daemon-reload: true
   when:
     - logstash_enable | bool
     - not logstash_freshstart.changed | bool
@@ -12,4 +13,5 @@
   ansible.builtin.service:
     name: logstash
     state: restarted
+    daemon-reload: true
   when: not logstash_config_autoreload and logstash_enable | bool