[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3508: grid-manager integration tests

[Tahoe-LAFS]

#3508: grid-manager integration tests
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 Reporter:  meejah        |          Owner:
     Type:  defect        |         Status:  new
 Priority:  normal        |      Milestone:  undecided
Component:  unknown       |        Version:  n/a
 Keywords:  grid-manager  |  Launchpad Bug:
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 The Grid Manager integration tests from #2916 needed some fairly extensive
 re-factoring (so a new grid could be created). To shorten the #2916 PR
 those refactors and test shall be discussed in a separate PR (for this
 bug).

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3508>
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