Fix generation of frontend metadata for SAMLVirtualCoFrontend

Fix a bug in the generation of the frontend metadata for the
SAMLVirtualCoFrontend.

Signed-off-by: Ivan Kanakarakis <[email protected]>

Author: skoranda

src/satosa/frontends/saml2.py

@@ -908,7 +908,10 @@ def _overlay_for_saml_metadata(self, config, co_name):
 
         :return: config with updated details for SAML metadata
         """
-        co_config = self._get_co_config(co_name)
+        all_co_configs = self.config[self.KEY_CO]
+        co_config = next(
+            item for item in all_co_configs if item[self.KEY_ENCODEABLE_NAME] == co_name
+        )
 
         key = self.KEY_ORGANIZATION
         if key in co_config: