Let's update M2E to latest upstream 1.6 milestone. I'll take care of that.
Fixed in eclipse-m2e-core-1.6.0-0.1
I believe that this feature is included in eclipse-m2e-core-1.6.0-0.1, which is available in Fedora Rawhide, so I am closing this bug now. The build which includes the feature can be found at Koji: http://koji.fedoraproject.org/koji/buildinfo?buildID=619823