Commits on Sep 26, 2022

1. fingerprint: lengthen Vault check after seen …

   Extension of #14673
   
   Once Vault is initially fingerprinted, extend the period since changes
   should be infrequent and the fingerprint is relatively expensive since
   it is contacting a central Vault server.
   
   Also move the period timer reset *after* the fingerprint. This is
   similar to #9435 where the idea is to ensure the retry period starts
   *after* the operation is attempted. 15s will be the *minimum* time
   between fingerprints now instead of the *maximum* time between
   fingerprints.
   
   In the case of Vault fingerprinting, the original behavior might cause
   the following:
   
   1. Timer is reset to 15s
   2. Fingerprint takes 16s
   3. Timer has already elapsed so we immediately Fingerprint again
   
   Even if fingerprinting Vault only takes a few seconds, that may very
   well be due to excessive load and backing off our fingerprints is
   desirable. The new bevahior ensures we always wait at least 15s between
   fingerprint attempts and should allow some natural jittering based on
   server load and network latency.

   

   schmichael committed Sep 26, 2022
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