Merge pull request #16 from slon1024/kafka

added roles kafka
Merge branch 'master' of https://github.com/slon1024/vagrant-cluster-storm
Merge branch 'kafka'
Merge branch 'kafka'
Merge branch 'kafka'
Merge branch 'kafka'
added start script
create log dir
added vars zookeeper: user, group and log_dir
added dependency: clean, java
initialize zookeeper script
added zookeeper to config supervisord
 reload in supervisord zoo
fix path to log dir
remove clean dependency
minor refactor
set user and group on zookeeper
refactoring tasks
added log properties
changed zoo.conf