QuotaSubTree CPU requests in millicores

[metalcycling]

When specifying CPU requests in quota trees, the number given is assumed to be in millicores and not full CPUs. For example, cpu: 1000 is taken to be 1000m = 1 CPUs as opposed to 1000 CPUs. This deviates from Kubernetes convention where in order to specify millicores an m is appended at the end of the request.

[z103cb]

This was closed by #367