Secret text credentials are not being updated when changed.

[nuclearsandwich]

The github_pull_request_builder secret text credential is not updating correctly when the data bag contents are changed. There are a number of idempotency challenges with the current credential setting which may need to be addressed upstream.

[ros-discourse]

This issue has been mentioned on ROS Discourse. There might be relevant details there:

https://discourse.ros.org/t/ros1-buildfarm-pr-testing-no-longer-works/21920/3