Add a way to programmatically update log levels

[ZakarFin]

Allows admin-users to make requests to server that change log levels at runtime. Makes it easier to debug on production.

Setting root-logger to logging level warn:

fetch("https://oskari.org/action?action_route=Logger&level=warn", {
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
});

Set debug logging for classes under org.oskari:

fetch("https://oskari.org/action?action_route=Logger&level=debug&name=org.oskari", {
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
});

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

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0 Vulnerabilities (and 0 Security Hotspots to review)
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