The fields(vcpus, memory and disk_capacity) in the Watcher ComputeNode
do not take allocation ratios used for overcommit into account so there
may be disparity between this and the used count.
This patch added some new fields to solve this problem.
Partially Implements: blueprint improve-compute-data-model
Change-Id: Id33496f368fb23cb8e744c7e8451e1cd1397866b
3d741d05aa