Set NAMEID_UNSPECIFIED as default NameIDFormat to prevent conflicts with IdPsthat don't support NAMEID_PERSISTENT

Author: pitbulk

src/onelogin/saml2/settings.py

@@ -262,7 +262,7 @@ def __add_default_values(self):
 
         # Related to nameID
         if 'NameIDFormat' not in self.__sp:
-            self.__sp['NameIDFormat'] = OneLogin_Saml2_Constants.NAMEID_PERSISTENT
+            self.__sp['NameIDFormat'] = OneLogin_Saml2_Constants.NAMEID_UNSPECIFIED
         if 'nameIdEncrypted' not in self.__security:
             self.__security['nameIdEncrypted'] = False