sync-test-repos.sh: Update topic and commit message

In preparation of using this script in the OpenStack CI propose job,
we update the topic branch and the commit message to match those
in the Jenkins job. This way we can use this script to update reviews
which were proposed by the Jenkins job.

Change-Id: I35a952af4f2d8147060412995c5f51cc7c039324

sync-test-repos.sh

@@ -68,7 +68,7 @@ process_changes() {
 
         # Commit changes
         git add .
-        git commit $([[ ${review} == "__no_review__" ]] || printf %s '--amend') -m '[auto] Syncing common OSA files'
+        git commit $([[ ${review} == "__no_review__" ]] || printf %s '--amend') -m 'Updated from OpenStack Ansible Tests'
         git review $(${dry_run} && printf %s '-n')
     )
 }
@@ -141,11 +141,11 @@ for proj in ${osa_projects[@]}; do
 
     pushd $proj_dir &> /dev/null
 
-    git checkout -b osa-auto-sync-test-files
+    git checkout -b openstack/openstack-ansible-tests/sync-tests
     # if there an open review, re-use it
     open_review=$(git review --no-color -l | \
         grep -v "^Found" | \
-        grep "\[auto\] Syncing common OSA files" | \
+        grep "Updated from OpenStack Ansible Tests" | \
         tail -n1 | awk '{print $1}')
     [[ -n ${open_review} ]] && \
         echo "Using existing review #${open_review} for ${proj_dir}" && \