refactor initialization of setting for user attribute serialization to SecuritySetting

Signed-off-by: Mark Boyd <[email protected]>

Author: markdboyd

src/main/java/org/opensearch/security/OpenSearchSecurityPlugin.java

@@ -2267,14 +2267,7 @@ public List<Setting<?>> getSettings() {
                 )
             );
 
-            settings.add(
-                Setting.boolSetting(
-                    ConfigConstants.USER_ATTRIBUTE_SERIALIZATION_ENABLED,
-                    ConfigConstants.USER_ATTRIBUTE_SERIALIZATION_ENABLED_DEFAULT,
-                    Property.NodeScope,
-                    Property.Dynamic
-                )
-            );
+            settings.add(SecuritySettings.USER_ATTRIBUTE_SERIALIZATION_ENABLED_SETTING);
         }
 
         return settings;

src/main/java/org/opensearch/security/support/SecuritySettings.java

@@ -36,4 +36,10 @@ public class SecuritySettings {
         Setting.Property.Dynamic
     ); // Not filtered
 
+    public static final Setting<Boolean> USER_ATTRIBUTE_SERIALIZATION_ENABLED_SETTING = Setting.boolSetting(
+        ConfigConstants.USER_ATTRIBUTE_SERIALIZATION_ENABLED,
+        ConfigConstants.USER_ATTRIBUTE_SERIALIZATION_ENABLED_DEFAULT,
+        Setting.Property.NodeScope,
+        Setting.Property.Dynamic
+    ); // Not filtered
 }