I didn't notice this until I manholed otter-api to run the health check.  kazoo's `SetPartitioner` dosdfasdfens't have an attribute `allocated`, however, txkazoo's `SetPartitioner.allocated` will always return true, because it returns [the lambda function here (`<function <lambda> at 0x7f8ce401bcf8>`)](https://github.com/rackerlabs/txkazoo/blob/master/txkazoo.py#L214).

Probably `acquired` is the attribute?  Or check if `self.kz_partition.allocating`?

`self.kz_partition.allocated` is also used in `check_events`