add 3rd parti stage out from WN after local fallback

[ericvaandering]

Original Savannah ticket 99111 reported by belforte on Tue Nov 27 10:22:13 2012.

see contribution by Bockjoo https://hypernews.cern.ch/HyperNews/CMS/get/crabFeedback/6294/2/1/1/3.html

[belforte]

realistically, with Crab3 coming out, it will never be done.