Route Candlepin logs to journald via stdout

[Alleny244]

Why are you introducing these changes?

Candlepin runs as a Podman container but currently writes application and Tomcat logs to host-mounted directories under /var/log/candlepin and /var/log/tomcat. This does not align with the containerized logging model, where services should log to stdout/stderr and rely on journald.

This change switches Candlepin, Tomcat, and HTTP access logging to stdout so all logs are collected by journald.

Related: Logging audit for journal-only deployments.

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What are the changes introduced in this pull request?

• Add logback.xml template using ConsoleAppender for Candlepin application logs.
• Add logging.properties template using ConsoleHandler for Tomcat internal logs.
• Mount both configuration files as Podman secrets.
• Remove host log volume mounts (/var/log/candlepin and /var/log/tomcat) and the task creating those directories.
• Add a Tomcat AccessLogValve to write HTTP access logs to stdout.
• Add integration tests to verify:
  • Candlepin logs are written to the journal.
  • Log volume mounts are no longer present.

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How to test this pull request

1. Deploy foremanctl from this branch.
2. Verify Candlepin is running:

   curl -sk https://localhost:23443/candlepin/status
   systemctl is-active candlepin

3. Generate a request and verify logs appear in the journal:

   curl -sk https://localhost:23443/candlepin/status
   sudo journalctl -u candlepin --since "1 min ago" --no-pager

4. Confirm the container no longer mounts /var/log/candlepin or /var/log/tomcat:

   sudo podman inspect candlepin --format '{{range .Mounts}}{{.Destination}} {{end}}'

5. Verify the old log files are no longer updated.
6. Run the new integration tests.

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Checklist

• Tests added/updated

[ehelms]

I don't think this test is necessary.