This allows looking up a compute node by its uuid to uniquely
identify it in a list of cells. A later REST API microversion
change will rely on this.
Note that the existing compute_node_get method is used to
minimize the impact to cells v1 (we would have to plumb through
all new support to cells v1 if we added a new HostAPI method).
Since the HostMapping in the API DB does not have the
ComputeNode.uuid we still have to loop over the cells to
find a match. This could be optimized later if needed.
Part of blueprint service-hyper-uuid-in-api
Change-Id: I705119442552e3d507e8d514218466942c5767f5
69336b024e