log more info during init() in plugins using whitelist

Author: Vladimir Kotal

plugins/src/main/java/opengrok/auth/plugin/LdapAttrPlugin.java

@@ -110,8 +110,8 @@ private void init(Map<String, Object> parameters) {
             throw new IllegalArgumentException(String.format("Unable to read the file \"%s\"", filePath), e);
         }
 
-        LOGGER.log(Level.FINE, "LdapAttrPlugin plugin loaded with attr={0}, whitelist={1}, instance={2}",
-                new Object[]{ldapAttr, filePath, ldapUserInstance});
+        LOGGER.log(Level.FINE, "LdapAttrPlugin plugin loaded with attr={0}, whitelist={1} ({2} entries), " +
+                        "instance={3}", new Object[]{ldapAttr, filePath, whitelist.size(), ldapUserInstance});
     }
 
     @Override

plugins/src/main/java/opengrok/auth/plugin/UserWhiteListPlugin.java

@@ -74,6 +74,9 @@ public void load(Map<String, Object> parameters) {
         } catch (IOException e) {
             throw new IllegalArgumentException(String.format("Unable to read the file \"%s\"", filePath), e);
         }
+
+        LOGGER.log(Level.FINE, "UserWhiteList plugin loaded with filePath={0} ({1} entries), fieldName={2}",
+                new Object[]{filePath, whitelist.size(), fieldName});
     }
 
     @Override