All the setup/teardown/pre/post/conditions template methods
now are required to return void. This was warned with phpunit 7
and now is enforced.
At the same time, fix a few wrong function names,
provider data and param types, return statements...
The following methods have been implemented for supporting
content-type translations:
- H5PEditorAjaxInterface.getTranslations. This method is used for
loading the "Text overrides and translations" section.
- H5peditorStorage.getLanguage. This method is used for displaying
the specific fields and messages for each content-type library.
- H5peditorStorage.getAvailableLanguages. This method is used to
get the language list displayed into the "Text overrides and
translations" section.