Add java duration converter to max_event_age config property (#24455)

* Add java duration converter to max_event_age config property

* Add java duration converter to max_event_age config property

Author: todvora

graylog2-server/src/main/java/org/graylog2/Configuration.java

@@ -301,7 +301,7 @@ public class Configuration extends CaConfiguration implements CommonNodeConfigur
     @Parameter(value = "global_inputs_only")
     private boolean globalInputsOnly = false;
 
-    @Parameter(value = "max_event_age", validators = PositiveDurationValidator.class)
+    @Parameter(value = "max_event_age", converter = JavaDurationConverter.class)
     private java.time.Duration maxEventAge = java.time.Duration.ofDays(1L);
 
     public boolean maintainsStreamAwareFieldTypes() {