Improve the way to build feature branches (and pull requests) on Jenkins

Right now everything is simple executed with "maven deploy" which mean feature branch can mess with master.

Ideally we should automatically change the version to something like 10.0-<branchename>-SNAPSHOT right before executing Maven. That way don't disturb the master branch but we can still use parallel build.

It's also the kind of stuff we will need to do for automated release so it's a good test.