jboss-parent 15, build update, xnio 3.3.0.Beta2, jboss-modules 1.4.0.Beta1

- jboss-parent 15
- build plugin dep updates
- xnio 3.3.0.Beta2
- jboss-modules 1.4.0.Beta1
as result of problems with new xnio / remoting, i will remove this commit all together