v2.3.0: Update the bundler version embedded in chef to 1.17.3

• Update the bundler version embedded in chef to 1.17.3.
  • In a recent Prod Incident we found some problems with some Ruby gems
    dependencies that are used in the MongoDB provision process and in other
    places as well. You can read more about the prod incident in
    https://sync.hudlnet.com/x/BiT6FQ
  • Vandelay investigated how to fix this for our role_mongo Cookbook in
    https://docs.google.com/document/d/11EJwHkUYwzol3HaqnAD8O1YX5lRYI1MTa8AblFPBVs8/edit?usp=sharing
  • The TLDR is we need to update the version of bundler before running chef.
  • To centralise the change in a single place, we are updating Tyr to place
    tge upgrade command in the user data of the instances provisioned by Tyr
    (MongoDB and RabbitMQ are provisioned by Tyr for example).
  • With this change here, Aspen will work as well as Aspen uses Tyr under the
    hood to provision the instances.