[NRL-1192] Fix config for integration tests against persistent environments

Author: mattdean3-nhs

tests/features/environment.py

@@ -17,7 +17,7 @@ def before_all(context: Context):
 
     context.env = context.config.userdata.get("env")
     context.account_name = context.config.userdata.get("account_name")
-    context.is_shared_resources = context.config.userdata.get("is_shared_resources")
+    context.is_shared_resources = context.config.userdata.get("use_shared_resources")
 
     context.stack_name = (
         context.account_name if context.is_shared_resources else context.env