partially reverted b11de93b85180dae2760267b28879becca27a487

It reverts the change made to avoid certain plugins being updated from the oficial repo
Merge branch 'final-2_2_0-boundless' of https://github.com/boundlessgeo/QGIS into final-2_2_0-boundless
[processing] updated processing code to latest version

This correspond to the code at acc6271f18eacbc7c1e635c55b419b478e8f3031 in the mainline QGIS repo