any value of type string, other than zk_is_leader and zk_version, will be skipped
any value of type string, other than zk_is_leader and zk_version, will be skipped

Signed-off-by: Dani Louca <37da6533ebb21b55f68509b39b26aebe72e04b06@splunk.com>

signalfx/collectd-zookeeper