Test pushes into gitea over ssh

Gerrit replicates to gitea via ssh, but our current testing only checks
that we can push over https. Test that pushing over ssh works properly
as this is what we actually need to work in production.

Change-Id: I0f7764a6d07e7d413a5b07a7f3ba8a9be7b4f0e3

playbooks/test-gitea.yaml

@@ -20,11 +20,34 @@
       fail:
         msg: Zuul description was not updated
       when: '"Zuuls new description" not in zuul_content.content'
+    - name: Configure ssh for pushing into test gitea
+      shell: |
+        ssh-keyscan -t rsa -p 222 localhost >> .ssh/known_hosts
+        ssh-keygen -t ed25519 -f /home/zuul/.ssh/id_ed25519 -C giteagerrittest -P ''
+    - name: Register new gitea gerrit pubkey value
+      slurp:
+        src: /home/zuul/.ssh/id_ed25519.pub
+      register: slurped_gitea_gerrit_pubkey
+    - name: Set testing key on gerrit account in gitea
+      no_log: true
+      uri:
+        user: root
+        password: "{{ gitea_root_password }}"
+        force_basic_auth: true
+        url: "https://localhost:3000/api/v1/admin/users/gerrit/keys"
+        validate_certs: false
+        method: POST
+        status_code: 201
+        body_format: json
+        body:
+          key: "{{ slurped_gitea_gerrit_pubkey['content'] | b64decode }}"
+          read_only: false
+          title: "Gerrit testing key"
     - name: Push system-config into our test gitea for testing
       shell: |
         cd /home/zuul/src/opendev.org/opendev/system-config
-        git remote add test-gitea https://gerrit:{{ gitea_gerrit_password }}@localhost:3000/opendev/system-config
-        GIT_SSL_NO_VERIFY=1 git push -f test-gitea master
+        git remote add test-gitea ssh://git@localhost:222/opendev/system-config
+        GIT_SSH_COMMAND='ssh -i /home/zuul/.ssh/id_ed25519' git push -f test-gitea master
 
 - name: Run rename playbook
   import_playbook: rename_repos.yaml