android-signing-plugin CI

[Michael Nazzareno Trimarchi]

Hi all

Can someone help on review this changes. I have seen that there is not CI set for this project but the plugin is broken for the new java requirements. I have created this pull request

https://github.com/jenkinsci/android-signing-plugin/pull/5

This should allow us to have it back again working

Any help will be appreciated 

Michael