fix old driver tests

Author: sfc-gh-mkeller

test/integ/conftest.py

@@ -17,11 +17,15 @@
 
 import snowflake.connector
 from snowflake.connector.compat import IS_WINDOWS
-from snowflake.connector.config_manager import CONFIG_MANAGER
 from snowflake.connector.connection import DefaultConverterClass
 
 from .. import running_on_public_ci
 
+try:
+    from snowflake.connector.config_manager import CONFIG_MANAGER
+finally:
+    CONFIG_MANAGER = None
+
 try:
     from ..parameters import CONNECTION_PARAMETERS
 except ImportError:
@@ -123,7 +127,10 @@ def get_db_parameters(connection_name: str = "default") -> dict[str, Any]:
         if connection_name == "default"
         else connection_name
     )
-    if cm_connection_name in CONFIG_MANAGER["connections"]:
+    if (
+        CONFIG_MANAGER is not None
+        and cm_connection_name in CONFIG_MANAGER["connections"]
+    ):
         # If config_manager knows of this connection then use it
         ret = CONFIG_MANAGER["connections"][cm_connection_name].value.value
     else: