Updated openstack/openstack
Project: openstack/nova  8252b4a1dc1b584f82e3d0c52a355b3cb3252ce6
null
Move the metrics update to get_metrics

It is not necessary to update the metrics when get every metric in
one compute monitor plugin, just update once when get metrics for
the monitor plugin.

Change-Id: Ib665188964de8318f6d94343891666c674111c8c