Annotate with @GenModule with vertx

Signed-off-by: Julien Viet <julien@julienviet.com>
Merge pull request #905 from vietj/master

Annotate with @GenModule with vertx
some fixes for clustering tests
work in progress
Merge branch 'master' of https://github.com/eclipse/vert.x
upgraded to netty 4.0.23
work around for netty future handler sometimes called on current thread
updated versions
work in progress.
Merge branch 'master' of https://github.com/eclipse/vert.x