Add gerrit 3.8 to 3.9 upgrade testing

The Gerrit 3.9 release notes [0] indicate this is a very similar upgrade
to the previous 3.7 to 3.8 upgrade. Specifically we only need to run
init and online reindexing will occur on startup of the new version.
For this reason not much changes other than version numbers.

[0] https://www.gerritcodereview.com/3.9.html

Change-Id: I11f7b3d5e0c545d9b78fb656ea1f09fe57b5994e

playbooks/zuul/upgrade-review.yaml

@@ -7,7 +7,7 @@
 - name: Ensure initial gerrit state without starting Gerrit
   import_playbook: ../service-review.yaml
   vars:
-    gerrit_container_image: docker.io/opendevorg/gerrit:3.7
+    gerrit_container_image: docker.io/opendevorg/gerrit:3.8
     gerrit_run_init: false
     gerrit_run_reindex: false
     gerrit_run_compose_up: false
@@ -35,7 +35,7 @@
 - name: Start Gerrit on the old version of Gerrit
   import_playbook: ../service-review.yaml
   vars:
-    gerrit_container_image: docker.io/opendevorg/gerrit:3.7
+    gerrit_container_image: docker.io/opendevorg/gerrit:3.8
 
 - hosts: "review:!disabled"
   name: "Wait for gerrit to be up and running"
@@ -84,9 +84,9 @@
 - name: Perform gerrit upgrade
   import_playbook: ../service-review.yaml
   vars:
-    gerrit_container_image: docker.io/opendevorg/gerrit:3.8
+    gerrit_container_image: docker.io/opendevorg/gerrit:3.9
     gerrit_run_init: true
-    # Gerrit 3.7 -> 3.8 upgrade does not require an offline reindex
+    # Gerrit 3.8 -> 3.9 upgrade does not require an offline reindex
     gerrit_run_reindex: false
 
 - hosts: "review:!disabled"

zuul.d/project.yaml

@@ -74,13 +74,13 @@
               - name: opendev-buildset-registry
               - name: system-config-build-image-gerrit-3.9
                 soft: true
-        #- system-config-upgrade-review:
-        #    dependencies:
-        #      - name: opendev-buildset-registry
-        #      - name: system-config-build-image-gerrit-3.7
-        #        soft: true
-        #      - name: system-config-build-image-gerrit-3.8
-        #        soft: true
+        - system-config-upgrade-review:
+            dependencies:
+              - name: opendev-buildset-registry
+              - name: system-config-build-image-gerrit-3.8
+                soft: true
+              - name: system-config-build-image-gerrit-3.9
+                soft: true
         - system-config-build-image-refstack
         - system-config-run-refstack:
             dependencies:

zuul.d/system-config-run.yaml

@@ -1093,20 +1093,20 @@
     vars:
       zuul_test_gerrit_version: '3.9'
 
-#- job:
-#    name: system-config-upgrade-review
-#    parent: system-config-run-review-base
-#    description: |
-#      Test we can upgrade a gerrit 3.7 to 3.8
-#    requires:
-#      - gerrit-3.7-container-image
-#      - gerrit-3.8-container-image
-#    vars:
-#      run_playbooks:
-#        - playbooks/letsencrypt.yaml
-#        - playbooks/zuul/upgrade-review.yaml
-#      run_test_playbook: playbooks/zuul/test-review.yaml
-#      zuul_test_gerrit_version: '3.7'
+- job:
+    name: system-config-upgrade-review
+    parent: system-config-run-review-base
+    description: |
+      Test we can upgrade a gerrit 3.8 to 3.9
+    requires:
+      - gerrit-3.8-container-image
+      - gerrit-3.9-container-image
+    vars:
+      run_playbooks:
+        - playbooks/letsencrypt.yaml
+        - playbooks/zuul/upgrade-review.yaml
+      run_test_playbook: playbooks/zuul/test-review.yaml
+      zuul_test_gerrit_version: '3.8'
 
 - job:
     name: system-config-run-static