Arvados

The page at https://doc.arvados.org/install/crunch2-cloud/install-compute-node.html is source based, and it does not take our releases into account. This means that by default, you get the bleeding edge/dev packages in your freshly baked compute image, which is not what you want.

Solution: either fix it by adding an explicit git checkout command (this would need to be autogenerated with the correct git branch, use an existing/new variable in the doc build scripts), or package the build script as a proper OS package, versioned like everything else.