Remove celery stubbing in tests/unit, it is no longer needed
Remove celery stubbing in tests/unit, it is no longer needed

Change-Id: Ic279555a1fc8ca0c1894a676287e820da9340307

intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre