Merge branch 'hotfix/test_support'

* hotfix/test_support:
  Support test and done some fixes
Merge branch 'master' of https://github.com/gouketsu/fork-elasticsearch-inout-plugin

* 'master' of https://github.com/gouketsu/fork-elasticsearch-inout-plugin:
  revert change to output_cmd to be backport compatible. add a output_json
  missing file
  Revert "fix possible issue with export"
  fix possible issue with export