Benjamin Huo 4cd61bfca8 Fix helm lint error for zookeeper-metadata.yaml (#2878)
### Motivation

The following errors occurs when running : 

helm lint pulsar/
==> Linting pulsar/
[INFO] Chart.yaml: icon is recommended
[ERROR] templates/: render error in "pulsar/templates/zookeeper-metadata.yaml": template: pulsar/templates/zookeeper-metadata.yaml:49:20: executing "pulsar/templates/zookeeper-metadata.yaml" at <.Values.zookeeper_me...>: can't evaluate field resources in type interface {}

### Modifications

Change  zookeeper_metadata in deployment/kubernetes/helm/pulsar/templates/zookeeper-metadata.yaml to zookeeperMetadata

### Result

helm lint pulsar/
==> Linting pulsar/
[INFO] Chart.yaml: icon is recommended

1 chart(s) linted, no failures
2018-10-29 13:00:00 -07:00
..