Problems connecting to Super Dev Mode server with 2.8 / multi-module project

Hey all, I have recently changed the structure of my project to separate client, server and shared code into their own maven projects (modules).

I am getting a HTTP Error 500 related to the Servlet API: java.lang.NoSuchMethodError: javax.servlet.http.HttpServletResponse.getHeader(Ljava/lang/String;)Ljava/lang/String;

If anyone can help me it would be massively appreciated, as I can't really do much without Super Dev Mode

Full info here: http://stackoverflow.com/questions/38979519/why-cant-gwt-connect-to-superdevmode-server-in-multi-module-maven-project

Thanks to all for your great work on GWT 2.8. It really is appreciated :)

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