Don't let a reqs sync fail kill the sync job

Try to sync each and every project. An error syncing a single project
should not cause the job to stop running early preventing syncage for
projects later in the list. Do this by setting the success flag
appropriately if syncing fails and continuing to the next project.

Change-Id: I801abca1f21643fc23a8e3b5e7fc6d89ebd313ff

modules/openstack_project/files/slave_scripts/propose_update.sh

@@ -90,11 +90,20 @@ EOF
             continue
         fi
 
+        # Don't short circuit when one project fails to sync.
+        set +e
         if [ "$OWN_PROJECT" == "requirements" ] ; then
             python update.py $PROJECT_DIR
         else
             bash -xe tools/sync-projects.sh $PROJECT_DIR
         fi
+        RET=$?
+        set -e
+        if [ "$RET" -ne "0" ] ; then
+            ALL_SUCCESS=1
+            echo "Error in syncing: Ignoring $PROJECT"
+            continue
+        fi
 
         pushd $PROJECT_DIR
         if ! git diff --stat --exit-code HEAD ; then