[21.05] fix rabbitmq user updates for sensu

[ctheune]

@flyingcircusio/release-managers

Release process

Impact:

n/a

Changelog:

• Fix an inconsistency in our Sensu configuration management that caused machines to not properly get updated credentials.. (PL-132945)

PR release workflow (internal)

• PR has internal ticket
• internal issue ID (PL-…) part of branch name
• internal issue ID mentioned in PR description text
• ticket is on Platform agile board
• ticket state set to Pull request ready
• if ticket is more urgent than within the next few days, directly contact a member of the Platform team

Design notes

• Provide a feature toggle if the change might need to be adjusted/reverted quickly depending on context. Consider whether the default should be on or off. Example: rate limiting.
• All customer-facing features and (NixOS) options need to be discoverable from documentation. Add or update relevant documentation such that hosted and guided customers can understand it as well.

Security implications

• Security requirements defined? (WHERE)

Monitoring needs to work. This is also handling passwords and I've paid attention that we don't spill them in world readable files more than we already do (they're in the store, so ...).

• Security requirements tested? (EVIDENCE)

manually verified in production due to critical need to see missing hosts

[osnyx]

still waiting for the Hydra tests to pass, otherwise LGTM

[osnyx]

sensu-server NixOS test currently fails.