Retry gitea repo setting HTTP POSTs

I ran our global gitea project sync playbook across all eight gitea
hosts and one failed with a 404 against a specific project. Rerunning
the playbook against that one gitea server worked fine.

Until we sort out why this might happen lets retry our HTTP POSTs up to
3 times until they succeed.

Some numbers: We have ~2k repos and 8 servers and make two http requests
per repo for a total of 32k requests. If one fails out of that the
success rate is very high so retrying a few times should be fine.

Change-Id: I937a4f852f6713a419c03a17c3b4984a97eae0d8

playbooks/roles/gitea-git-repos/tasks/setup-repo.yaml

@@ -51,6 +51,10 @@
 
 - name: Adjust repo settings
   when: gitea_always_update or project.project not in gitea_repos
+  register: result
+  retries: 3
+  until: result is succeeded
+  delay: 5
   uri:
     url: "{{ gitea_url }}/{{ org }}/{{ repo }}/settings"
     validate_certs: false
@@ -75,6 +79,10 @@
       tracker_issue_style: numeric
 - name: Set default branch
   when: gitea_always_update or project.project not in gitea_repos
+  register: result
+  retries: 3
+  until: result is succeeded
+  delay: 5
   uri:
     url: "{{ gitea_url }}/{{ org }}/{{ repo }}/settings/branches"
     validate_certs: false