Comment 1 for bug 1064909

Still occuring as of rev 827

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FAIL: presence_test.go:253: PresenceSuite.TestWatchPeriod

[LOG] 21.82379 JUJU state/presence: Faking presence to time slot 0
[LOG] 21.82385 JUJU state/presence: Not faking presence time. Real time slot in use.
[LOG] 21.84842 JUJU:DEBUG state/presence: got request: presence.reqWatch{key:"a", ch:(chan<- presence.Change)(0xc2007d4840)}
[LOG] 21.84868 JUJU:DEBUG state/presence: synchronizing watcher knowledge with database...
[LOG] 21.85689 JUJU:DEBUG state/presence: starting pinger for "a" with seq=1
[LOG] 21.85690 JUJU:DEBUG state/presence: pinging "a" with seq=1
[LOG] 21.85783 JUJU:DEBUG state/presence: stopping pinger for "a" with seq=1
[LOG] 22.84881 JUJU:DEBUG state/presence: synchronizing watcher knowledge with database...
presence_test.go:272:
    assertChange(c, ch, presence.Change{"a", true})
presence_test.go:63:
    c.Fatalf("watch reported nothing, want %v", want)
... Error: watch reported nothing, want {a true}

OOPS: 10 passed, 1 FAILED
--- FAIL: TestPackage (9.39 seconds)