Pass tripleo-admin user for updates/upgrades in Queens.

fs037 and fs051, use config-download when running Queens jobs. The
config-download deployment uses tripleo-admin user for the ansible
execution, however we had hardcoded the zuul user (as Rocky, Stein
and master do use config-download by default). As a consequence, to
have the Queens jobs which use these featuresets working, we need
to specify the use of the overcloud-ssh-user to tripleo-admin.

Change-Id: I475c7c805fdcaa90b9b0183135d81f10faba3b8d
Closes-Bug: #1840763

config/general_config/featureset037.yml

@@ -25,7 +25,12 @@ tripleo_upgrade_debug: true
 tripleo_upgrade_converge_plan_only: true
 tripleo_ci: true
 use_oooq: true
-overcloud_ssh_user: "zuul"
+overcloud_ssh_user: >-
+  {% if release in ['queens'] -%}
+  "tripleo-admin"
+  {%- else -%}
+  "zuul"
+  {%- endif -%}
 
 network_isolation: false
 enable_pacemaker: false

config/general_config/featureset051.yml

@@ -54,7 +54,13 @@ container_registry_file: >-
 tripleo_ci: true
 use_oooq: true
 tripleo_upgrade_debug: true
-overcloud_ssh_user: "zuul"
+overcloud_ssh_user: >-
+  {% if release in ['queens'] -%}
+  "tripleo-admin"
+  {%- else -%}
+  "zuul"
+  {%- endif -%}
+
 # Mandatory for deployed_servers
 tripleo_upgrade_validations_non_fatal: true
 # Reduce CI wall time