added new tests for the operations inside the order_resource_spec (specific operations)
TESTS ARE FAILING because of inconsistency in the test data
test data inconsistency fixed
updating the test_config.setupTest() method to allow the cumulative setup of testData (was the only behaviour before, it is not true anymore: the default behaviour is that every call will erase the existing testData)
adding the getResourcesGroupedByOrders method to the batch.
removing debug printing