Fix Zookeeper download url
#Variables associated with this role
# zookeeper related variable
zookeeper_version: 3.4.8
-zookeeper_url: http://www.us.apache.org/dist/zookeeper/zookeeper-{{zookeeper_version}}/zookeeper-{{zookeeper_version}}.tar.gz
+zookeeper_url: https://archive.apache.org/dist/zookeeper/zookeeper-{{zookeeper_version}}/zookeeper-{{zookeeper_version}}.tar.gz
apt_cache_timeout: 3600
client_port: "{{ zookeeper_client_port }}"
