[metrics-bugs] #24292 [Metrics/ExoneraTor]: Rename ExoneraTor packages

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#24292: Rename ExoneraTor packages
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     Reporter:  karsten             |      Owner:  metrics-team
         Type:  enhancement         |     Status:  new
     Priority:  Medium              |  Milestone:
    Component:  Metrics/ExoneraTor  |    Version:
     Severity:  Normal              |   Keywords:
Actual Points:                      |  Parent ID:
       Points:                      |   Reviewer:
      Sponsor:                      |
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 This ticket is based on a discussion on #24036:

  - Rename root package `org.torproject.exonerator` to
 `org.torproject.metrics.exonerator` to make it part of the Tor Metrics
 name space.
  - Reconsider moving some classes to metrics-lib for re-use from metrics-
 web, but not before the Jetty switch and possibly related changes are
 over.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24292>
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