I updated portlet-api jar in JBoss maven repo (http://repository.jboss.com/maven2/javax/portlet/portlet-api/2.0/) to the latest one.

Because the 2.0 version was already used in the repo, maven may not update this jar in your local repo. So if you'll have any problems building portlet module please try to remove ~/.m2/repository/javax/portlet/2.0 dir.