Replace zookeeper::default with zookeeper::install

Zookeeper::default includes install and config_render recipes. Since the configuration zoo.cfg is generated by exhibitor, there is no need for Chef to edit this file.
In fact, when this exists, subsequent Chef runs will overwrite the local file, leading to inconsistent state and file churn.
Merge pull request #14 from DorianZaccaria/patch-1

Replace zookeeper::default with zookeeper::install