I had the same issue with IAM, Wicket and Gmaps.
I've solve it. My project was still having the old Q4e in the classpath
(my fault!).
The way I solved it :
-in the Maven2 context menu, uncheck "use maven dependancy management"
-remove the old Q4E from the classpath (right click on the project ->
properties -> Java build path -> librairies)
-Reactivate maven for the project (check "use maven dependancy management"
in the maven2 context menu).