[437983] Provide discovery of task packages for model authors
[437983] Provide discovery of task packages for model authors

https://bugs.eclipse.org/bugs/show_bug.cgi?id=437983
peterkir/org.eclipse.oomph,peterkir/org.eclipse.oomph,peterkir/org.eclipse.oomph,peterkir/org.eclipse.oomph,peterkir/org.eclipse.oomph