test(engine): add failing testcase for case insensitive task name order

related to #CAM-2827
feat(engine): add case insensitive task name ordering

related to #CAM-2827
fix(engine): history level configuration for json serialization test

related to CAM-2903
fix(engine-rest): deserialize custom objects query parameter

- adds missing parameter to GET single variable instance, historic variable
  instance and historic detail

related to CAM-2889