[3:3:2:2] When approving a Partner, wait for the response before updating the status

[armahillo]

(Pulled from RfG#672)

Note - This requires work on both the diaper and partner apps. Each point below will require altering the api endpoint on each app as well as whatever is making the request to the endpoint.

Summary

In the partners_controller.rb there is an action #approve_application that automatically sets a partner status to approved. Instead, it should wait for the results of DiaperPartnerClient.put before making the change. Scheduled retries or something similar my be required.

Criteria for Completion

• A passing test that confirms that the status is NOT set if the put fails
• A passing test that confirms the status is set if the put is successful
• Verification from the Partner app that any additional work on that end is working

Reference / History

This was originally part of https://github.com/rubyforgood/diaper/issues/636. It is similar to #2