Re-pin Uchiwa version back to 0.2.4-1
Re-pin Uchiwa version back to 0.2.4-1

The 0.3 (golang) release of uchiwa appears to need Websockets support
in proxies in front of it. Without this, it gives a '404' error..

While this is fixed, re-pin the version back down to the Node 0.2.4 version.

ministryofjustice/sensu-formula,ministryofjustice/sensu-formula