Fix bug on settings constructor related to sp_validation_only

Author: pitbulk

src/onelogin/saml2/settings.py

@@ -70,7 +70,7 @@ def __init__(self, settings=None, custom_base_path=None, sp_validation_only=Fals
         :param custom_base_path: Path where are stored the settings file and the cert folder
         :type custom_base_path: string
         """
-        self.__sp_validation_only = False
+        self.__sp_validation_only = sp_validation_only
         self.__paths = {}
         self.__strict = False
         self.__debug = False