bugfixes:
  - na_ontap_flexcache - one occurrence of msg missing in call to fail_json.
  - na_ontap_igroup - one occurrence of msg missing in call to fail_json.
  - na_ontap_lun - three occurrencse of msg missing in call to fail_json.
  - na_ontap_lun_map_reporting_nodes - one occurrence of msg missing in call to fail_json.
  - na_ontap_snapmirror - one occurrence of msg missing in call to fail_json.