Update mock agent card attributes in tests

Additionally, coverage fails when test files have the same name:
./jsonrpc_test_fastapi_app.py and ./rest/test_fastapi_app.py
So, the latter one was renamed to ./rest/test_rest_fastapi_app.py

Author: darkhaniop

tests/server/apps/jsonrpc/test_fastapi_app.py

@@ -39,8 +39,8 @@ def mock_app_params(self) -> dict:
         # Ensure 'url' attribute exists on the mock_agent_card, as it's accessed
         # in __init__
         mock_agent_card.url = 'http://example.com'
-        # Ensure 'supports_authenticated_agent_card' attribute exists
-        mock_agent_card.supports_authenticated_agent_card = False
+        # Ensure 'supports_authenticated_extended_card' attribute exists
+        mock_agent_card.supports_authenticated_extended_card = False
         return {'agent_card': mock_agent_card, 'http_handler': mock_handler}
 
     @pytest.fixture(scope='class')

tests/server/apps/jsonrpc/test_starlette_app.py

@@ -40,8 +40,8 @@ def mock_app_params(self) -> dict:
         # Ensure 'url' attribute exists on the mock_agent_card, as it's accessed
         # in __init__
         mock_agent_card.url = 'http://example.com'
-        # Ensure 'supportsAuthenticatedExtendedCard' attribute exists
-        mock_agent_card.supportsAuthenticatedExtendedCard = False
+        # Ensure 'supports_authenticated_extended_card' attribute exists
+        mock_agent_card.supports_authenticated_extended_card = False
         return {'agent_card': mock_agent_card, 'http_handler': mock_handler}
 
     @pytest.fixture(scope='class')