trial fails to set reactor.running flag

[landonf]

Reproduction case:

from twisted.internet import reactor
from twisted.trial import unittest

class ReactorIsRunning(unittest.TestCase):
    def test_reactorIsRunning(self):
        self.failUnless(reactor.running)

[exarkun]

#3178 was a duplicate of this. It has a lot of discussion, so I'm closing this one as a duplicate instead, even though this one was filed first.