[RPKI] Routinator irregular refresh interval

[Martin Hoffmann]

Blažej Krajňák wrote:
> 
> Despite of that, let's take a look on Routinator's behavior. I did
> simple logging of selected data from API in a minute interval and it
> looks really interesting.

I will do some research into what the cause of these cycles is and how
we can avoid them.
 
> Refresh parameter is set to 14400. After a period of more than hour of
> "peace", we got 7 new serials in 21 minutes. What's more interesting,
> in many cases lastUpdateStart > lastUpdateDone

This happens when a validation run is currently ongoing. In this case
lastUpdateStart refers to the start time of the current run while
lastUpdateDone refers to the previous run. The names may be slightly
misleading.

  -- Martin