If you have not followed the Play framework mailing list, it is likely you have never heard of Calimoucho as software. Basically, Calimoucho itself is a Play application, which checks out other applications from a VCS, runs their tests, and reports this in a simple GUI. If you think Setting up a Jenkins instance and configuring it appropriately usually takes quite some time and might not be needed for a small play project. In such a case using Calimoucho makes sense.
In case you are wondering where the name is from: It is a drink, which consists of cola and red wine. The tool is way better than the drink.
You can find the source code of this example in the