Lualatex and kerning with minion pro

Question

I'm trying to fix the kerning around the quote with a feature file. I looked at several answer and tried this one:

\documentclass[12pt]{article}
\usepackage[french]{babel}
\usepackage{filecontents,fontspec,microtype}
\begin{filecontents*}{minion.fea}
   languagesystem DFLT dflt;
   languagesystem latn dflt;

feature kern {
  pos  \quoteright \a 40;
  pos \quoteright \eacute 10;
  pos \quoteright \o 10;
  pos \quoteright \e 8000;
 } kern;
\end{filecontents*}
\setmainfont{MinionPro-Regular}[
  FeatureFile={minion.fea},Path=fonts/]
\frenchspacing
\begin{document}
l’étranger

d’accord

d’ores et déjà

L'e
\end{document}

It doesn't change the kerning

it's particulary bad with a "L". Any tips ?

I'm using Miktex 2.9

Thank you

Edit: Using the suggestion in comment

\documentclass[12pt]{article}
\usepackage[french]{babel}
\usepackage{filecontents,fontspec,microtype}
\directlua{
fonts.handlers.otf.addfeature {
name = "ktest",
{
type = "kern",
data = {
["quoteright"] = { ["e"] =  50,
                   ["a"] =  50,
                   ["eacute"] =  50,
                   ["o"] =  50, },
}
},
"extra kerns"
}
}
\setmainfont{MinionPro-Regular}[
  RawFeature=+ktest,
  Path=fonts/]
\frenchspacing
\begin{document}
l’étranger

d’accord

d’ores et déjà

L'e
\end{document}