Update tests for generator change

Author: rmosolgo

spec/integration/rails/generators/graphql/install_generator_spec.rb

@@ -239,9 +239,9 @@ def execute
     }
     result = DummySchema.execute(query, variables: variables, context: context, operation_name: operation_name)
     render json: result
-  rescue => e
+  rescue StandardError => e
     raise e unless Rails.env.development?
-    handle_error_in_development e
+    handle_error_in_development(e)
   end
 
   private