Comment 2 for bug 1790126

Reviewed: https://review.openstack.org/598611
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4fd7c93726eff4cc0b010741ea1772cf19c314fc
Submitter: Zuul
Branch: master

commit 4fd7c93726eff4cc0b010741ea1772cf19c314fc
Author: Radoslav Gerganov <email address hidden>
Date: Fri Aug 31 13:53:19 2018 +0300

    Do not dump all instances in the scheduler

    There is a log message in the scheduler which dumps all instances
    running on a compute host. There are at least 2 problems with this:
    1. it generates huge amount of logs which are not really useful
    2. it crashes when there is an instance with non-ascii name

    Instead of fixing 2), just print instance UUIDs.

    Closes-Bug: #1790126
    Related-Bug: #1620692
    Change-Id: I0eda1c58a7eb54121230c880818b4b1d0fdf4893