* fix(dashboard_api): delete non-exist user wrongly return 204
* fix(dashboard): dashboard user should use `tags` not `tag`
* fix(dashboard): create/update user return 200 with full users list
* fix(dashboard): logout status code 204
* fix(dashboard): update pwd status code 204
* test: test suite for dashboard APIs
* refactor(dashboard): user info mnesia record name use description
* style: make elvis happy
* fix(api): dashboard swagger check request should not override env
* fix(dashboard): add/modify dashboard returns single record
* ci: update emqx-fvt version to new tag 1.0.2-dev1