First, I would like to apologize for being out during 5 months. Some matters did not give me enough time to make some progress on the plugin.
I almost finished to completely rewrite communication layer by removing Jenkins CLI and replacing it by Apache HttpClient. Indeed, some protocols, such as SSL were requested. This layer will be more flexible to support further protocols (SSH, container, etc.).
So, the 0.3 is on the way and it will be released by the beginning of November.
At last, I would like to thank the users who gave me some feedback.