Upgrade buildhelper-maven-plugin
Upgrade buildhelper-maven-plugin

This fixes an incompatibility in recent m2eclipse installations
not correctly adding extra source folders

yamcs/yamcs,m-sc/yamcs,m-sc/yamcs,yamcs/yamcs,yamcs/yamcs,m-sc/yamcs,yamcs/yamcs,yamcs/yamcs,m-sc/yamcs,fqqb/yamcs,m-sc/yamcs,fqqb/yamcs,m-sc/yamcs,fqqb/yamcs,yamcs/yamcs,fqqb/yamcs,fqqb/yamcs,fqqb/yamcs