Zero-Rails_OpenApi 1.5.2 release!

Added

1. do_* can be passed common schema after (or before) by:.
2. when this action can be accessed through multiple HTTP methods (but not set through match),
   it also matches and generate both HTTP methods.

Changed

1. root_controller => base_doc_class.
2. ctrl_path => ctrl_base.
3. apis_tag => doc_tag.
4. @_ctrl_infos => @doc_info, @_api_infos => @api_info, @_apis_dry_blocks => @zro_dry_blocks.
5. OpenApi.paths_index => OpenApi.routes_index.
6. get_actions_by_ctrl_path => get_actions_by_route_base.
7. Config.dft_file_format => Config.file_format.
8. Modify the description of the test case (remove should).
9. deep_merge! instead of _fusion.
10. ApiInfoObj => ApiInfo.