Add setSchemasPath to Auth class and fix backward compatibility

Author: pitbulk

lib/Saml2/Auth.php

@@ -181,6 +181,17 @@ public function setStrict($value)
         $this->_settings->setStrict($value);
     }
 
+    /**
+     * Set schemas path
+     *
+     * @param string $path
+     * @return $this
+     */
+    public function setSchemasPath($path)
+    {
+        $this->_paths['schemas'] = $path;
+    }
+
     /**
      * Process the SAML Response sent by the IdP.
      *

lib/Saml2/Settings.php

@@ -229,7 +229,7 @@ public function getSchemasPath()
         if (isset($this->_paths['schemas'])) {
             return $this->_paths['schemas'];
         }
-        return $this->_paths['lib'].'schemas/';
+        return __DIR__ . '/schemas/';
     }
 
     /**