Add 'plugins/struts2-jsf-plugin/' from commit '8fb3c8e63e8bb2e7cc46cdefd2a51b807500dc50'

git-subtree-dir: plugins/struts2-jsf-plugin
git-subtree-mainline: 26af44ad43d22929ce693e1ec400fbc914c43003
git-subtree-split: 8fb3c8e63e8bb2e7cc46cdefd2a51b807500dc50