nsqd: paused channel becomes unpaused when nsqd bounces

We've seen in production an issue where we have a paused channel. If one of the nsqd processes in the cluster bounces, the channel on that particular node becomes unpaused and starts processing again. The other nodes remain paused.
![nsq_jstats allingested___acunuworker-3](https://f.cloud.github.com/assets/1785178/1254430/d7bc70a2-2b75-11e3-93f6-eca8efd9558d.jpg)