Update LdapAdapter.php

provide static function for instantiation

model/LdapAdapter.php

@@ -58,6 +58,16 @@ class LdapAdapter implements LoginAdapter
      */
     protected $adapter;
     
+    /**
+     * Create an adapter from the configuration
+     * 
+     * @param array $configuration
+     * @return \oat\authKeyValue\model\AuthKeyValueAdapter
+     */
+    public static function createFromConfig(array $configuration) {
+        return new self($configuration);
+    }
+
     /**
      * @param array $configuration
      */