Revert "drop the deploy retry script"

This reverts commit 6e51ad8.

Author: cognifloyd

.circleci/config.yml

@@ -76,8 +76,11 @@ jobs:
             sudo apt -y install gmic optipng
             ~/ci/.circle/install_gh
       - run:
+          # NOTE: We try to retry the script up to 5 times if it fails. The command could fail due
+          # to the race (e.g. we try to push changes to index, but index has been updated by some
+          # other pack in the mean time)
           name: Update exchange.stackstorm.org
-          command: ~/ci/.circle/deployment
+          command: ~/ci/.circle/retry_on_failure.sh ~/ci/.circle/deployment
 
 workflows:
   version: 2