Increase zookeeper sync/init timeouts, add max client connections

[stevendborrelli]

• Git commit hash or branch: master
• Cloud Environment: openstack

On larger zookeeper data sets, followers can fail to synchronize with the master if the sync limit is too low. Also allow maxClientConnections to be set via ansible.

Increase initLimit and syncLimit on zookeeper to the following default values.

initLimit=20
syncLimit=10
maxClientCnxns=200

[stevendborrelli]

Closing this, there are already vars to do this in the main zookeeper role.