Change validators to use the validator_context

Change InstanceKeys to take a namedtuple for context

util/config/validators/validate_actionlog_archiving.py

@@ -4,7 +4,9 @@ class ActionLogArchivingValidator(BaseValidator):
   name = "actionlogarchiving"
 
   @classmethod
-  def validate(cls, config, user, user_password, app):
+  def validate(cls, validator_context):
+    config = validator_context.config
+
     """ Validates the action log archiving configuration. """
     if not config.get('FEATURE_ACTION_LOG_ROTATION', False):
       return