increase the default timeout of 20 secs.  The heartbeats are expected to be sent every 1/3 the timeout interval and response received within 1/3 timeout. We have seen the writes to disk take as high as 5-6 secs and hence heartbeat response missed and reconnects.

https://github.com/python-zk/kazoo/issues/66
Merge pull request #644 from Juniper/kazoo_client_timeout

increase the default timeout of 20 secs.