Servers in `nova list` get renamed on a minor upgrade of Red Hat OpenStack Platform 8

Issue

Servers in nova list get renamed on a minor upgrade of Red Hat OpenStack Platform 8 and OpenStack Director does not seem to respect the custom names from HostnameMap any longer.

From scheduler_hints.yaml:

HostnameMap:
   overcloud-controller-0: custom-controllername-01
   overcloud-controller-1: custom-controllername-02
   overcloud-controller-2: custom-controllername-03
   overcloud-novacompute-0: custom-computename-001
   overcloud-novacompute-1: custom-computename-002
   overcloud-novacompute-2: custom-computename-003

Before the minor upgrade:

| b45330a7-6020-4f24-8178-1419aee9df1b | custom-computename-001  | ACTIVE | -          | Running     | ctlplane=192.0.2.158 |

After the minor upgrade:

[stack@undercloud ~]$ nova list | head -n20
+--------------------------------------+-----------------------+--------+------------+-------------+-------------------------+
| ID                                   | Name                  | Status | Task State | Power State | Networks                |
+--------------------------------------+-----------------------+--------+------------+-------------+-------------------------+
| e95ad875-cb0e-4605-a666-78d1f0481d35 | custom-controllername-01          | ACTIVE | -          | Running     | ctlplane=192.0.2.150 |
| 20db4129-bf0a-417f-bb11-7e152e868fb4 | custom-controllername-02          | ACTIVE | -          | Running     | ctlplane=192.0.2.147 |
| 26557b8a-7221-4a11-9549-51c5c3f4c947 | custom-controllername-03          | ACTIVE | -          | Running     | ctlplane=192.0.2.149 |
| b45330a7-6020-4f24-8178-1419aee9df1b | overcloud-compute-0   | ACTIVE | -          | Running     | ctlplane=192.0.2.158 |
| b656e58e-0dcd-43b3-bc08-bcca1f3f8e49 | overcloud-compute-1   | ACTIVE | -          | Running     | ctlplane=192.0.2.153 |
| 8e36cbf9-41c4-4cb3-a7f4-ef781e9b2b78 | overcloud-compute-100 | ACTIVE | -          | Running     | ctlplane=192.0.2.242 |
| 9cf231ab-fa8d-44d1-b83f-fbeed29c04a1 | overcloud-compute-101 | ACTIVE | -          | Running     | ctlplane=192.0.2.234 |
| 06cd75bc-d2a0-4dbe-bd2d-bbb90bd3205d | overcloud-compute-102 | ACTIVE | -          | Running     | ctlplane=192.0.2.235 |
| ce2b4002-244b-4292-854c-d5650943cf1a | overcloud-compute-103 | ACTIVE | -          | Running     | ctlplane=192.0.2.241 |
| 3c9cbdd4-3cb8-4321-b92f-82b8c053df1e | overcloud-compute-104 | ACTIVE | -          | Running     | ctlplane=192.0.2.236 |
| 81fb7860-5a23-4b41-9426-0f1c181846c8 | overcloud-compute-105 | ACTIVE | -          | Running     | ctlplane=192.0.2.238 |
| 0069e54a-5dc4-45f1-a80a-43bfe4148771 | overcloud-compute-106 | ACTIVE | -          | Running     | ctlplane=192.0.2.240 |
| 229838dd-ef68-4ad0-8470-c59fbbf25c60 | overcloud-compute-107 | ACTIVE | -          | Running     | ctlplane=192.0.2.233 |
| 07b5d22d-c54a-4895-a414-536c5d7ba57a | overcloud-compute-108 | ACTIVE | -          | Running     | ctlplane=192.0.2.237 |
| 0b500bd2-3295-403e-9673-be97ca17d9d3 | overcloud-compute-109 | ACTIVE | -          | Running     | ctlplane=192.0.2.239 |
| 8860abdd-e2c3-43fb-ae00-53a482c3b57b | overcloud-compute-110 | ACTIVE | -          | Running     | ctlplane=192.0.2.246 |
| 2ae9ab9a-88dc-43a2-9299-8a3680d66bcd | overcloud-compute-111 | ACTIVE | -          | Running     | ctlplane=192.0.2.243 |