[Buildbot] #2834: Changes from perforce server not correctly listed in waterfall view since 0.8.9

[Buildbot trac]

#2834: Changes from perforce server not correctly listed in waterfall view since
0.8.9
------------------------+--------------------
Reporter:  lunochod     |       Owner:
    Type:  defect       |      Status:  new
Priority:  major        |   Milestone:  0.9.+
 Version:  0.8.9        |  Resolution:
Keywords:  p4, changes  |
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Comment (by dustin):

 Ah, indeed, so setting `server_tz` is the solution here.  However, *if*
 you set it to `"Europe/Berlin"`, you'll see that Buildbot will crash with
 something like
 {{{
 TypeError: tzinfo argument must be None or of a tzinfo subclass, not type
 'str'
 }}}
 In fact, supporting string timezones requires pytz, which we do not
 currently use.  You can work around that by installing pytz and passing
 `server_tz=pytz.timezone('Europe/Berlin')` to P4Poller.

 I'll see if I can get this fixed up in the codebase.

--
Ticket URL: <http://trac.buildbot.net/ticket/2834#comment:5>
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