* TOB-018 remediation
* Make key derivation an optional config flag, off by default, for backwards compatibility
* Fix unit tests
* Address some feedback
* Set config on unit test
* Fix another test failure
* One more conf fail
* Switch one of the test cases to not use a derive dkey
* wip
* comments
For situations where you want the Vault agent to handle one or more templates but do not require the acquired credentials elsewhere.
Modify the logic in SyncServer so that if there are no sinks, ignore any new credentials. Since SyncServer is responsible for shutting down the agent, make sure it still properly shuts down in this new situation.
Solves #7988