[metrics-bugs] #22249 [Metrics/Onionoo]: Remove deprecation warnings as soon as metrics-lib 1.7.0 is released

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#22249: Remove deprecation warnings as soon as metrics-lib 1.7.0 is released
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     Reporter:  karsten          |      Owner:  metrics-team
         Type:  enhancement      |     Status:  new
     Priority:  Medium           |  Milestone:
    Component:  Metrics/Onionoo  |    Version:
     Severity:  Normal           |   Keywords:
Actual Points:                   |  Parent ID:
       Points:                   |   Reviewer:
      Sponsor:                   |
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 Current Onionoo master does not use any deprecated metrics-lib methods,
 but as soon as we release metrics-lib 1.7.0 and update Onionoo to use that
 there will be some errors and some warnings.  I found 2 errors and 3
 warnings in the tests.  There might be more when metrics-lib 1.7.0 comes
 out.  This ticket is a placeholder to make sure that we remove these
 errors and warnings soon after they appear.

 In this context we might also want to fix the deprecation warnings related
 to `TimeFactory#getTime()`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22249>
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