Fix bin/test script

It should return != 0 on errors, and does absolutely not need to depend on bash.
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Fix adhocracy.behind_proxy evaluation in requestlogger

Previously, adhocracy.behind_proxy was always the default since pylons.config is not initialized at the point of evaluation.