Revert haystack to 2.4.1; `develop` will upgrade
Revert haystack to 2.4.1; `develop` will upgrade

Commit 2db8752 is needed for compatibility with `2.5.0`

kobotoolbox/kpi,onaio/kpi,onaio/kpi,onaio/kpi,kobotoolbox/kpi,onaio/kpi,kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi