[SERVER-15866] Investigate behavioural change between 2.6 and 2.8 in stepDown - MongoDB Jira

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Not sure if it's a bug. I'm labeling as that for the time being.
Run stepDown.py from here: https://github.com/dcci/mongo-replication-perf
The test completes on 2.6, but not on 2.8.

$ python stepDown.py --cfg spawn-examples/example-3nodes.json

localhost:30003 0.943552017212

command SON([('replSetStepDown', 30)]) failed: No electable secondaries caught up as of 2014-10-29T20:39:39.348+0000

{u'hosts': [u'localhost:30001', u'localhost:30002', u'localhost:30003'],

 u'ismaster': True,

 u'localTime': datetime.datetime(2014, 10, 29, 20, 39, 39, 348000),

 u'maxBsonObjectSize': 16777216,

 u'maxMessageSizeBytes': 48000000,

 u'maxWireVersion': 3,

 u'maxWriteBatchSize': 1000,

 u'me': u'localhost:30003',

 u'minWireVersion': 0,

 u'ok': 1.0,

 u'primary': u'localhost:30003',

 u'rbid': 1124988512,

 u'secondary': False,

 u'setName': u'rs0',

 u'setVersion': 1}

mongod logs attached.