[#45902819] inheritance of contexts

Squashed commit of the following:

commit 285760b36cf366e728c68efe8020de7a62464bd8
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Thu Mar 28 13:09:02 2013 +0100

    finish integration test

commit 1058a2a403b625a2b129baa59202137fbd1e3782
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Wed Mar 27 14:52:57 2013 +0100

    [WIP] continue inheritance_of_contexts.feature

commit aeb04df6912b1379b3d3cc3bca38743454d71953
Author: Sebastian Pape <email@sebastianpape.com>
Date:   Wed Mar 27 14:23:17 2013 +0100

    [WIP] start inheritance_of_contexts.feature