Better observers support #56
Description
Determine whether a server is an observer based on an attribute. e.g.:
class {'zookeeper':
role => 'observer', # default value would `master`
}or using some kind of configuration hash:
zookeeper:cluster:
'foo.example.com':
id: 1
ip: "192.168.1.1"
election_port: 2889
leader_port: 3999
role: 'master'
'bar.example.com':
id: 2
ip: "192.168.1.2"
election_port: 2889
leader_port: 3999
role: 'observer'