Updated openstack/openstack
Project: openstack/nova  6d593641a07f8220209cb3d69d824263b4c4c580
null
Refactor stats to avoid bad join

Refactor compute node methods to remove slow join with compute node
stats.  Stats are encoded instead in a single json/text column.

Implements: blueprint compute-node-stats-as-resource-tracker-extension

Change-Id: I1651d758dd21c87ccd768fdd86c910ec5080c71c