piojo/configuration-modules-core — pull request #2 by piojo (2013-04-03 19:50:51+00:00)
Title: Manage packages in two transactions

As discussed in [the wiki](https://trac.lal.in2p3.fr/Quattor/wiki/Development/YumAndSPMA), we need to split our transaction in two phases. Otherwise the component will choose the wrong packages for removal, and crash in ways that require manual intervention.