Fixes#5857
### Motivation
With current aproach for specifying storage class in persistent volume claim it's not possible to customize the provisioner parameters. If the property 'storageClass' is declared the chart always create a new storage class with hardcoded parameters.
### Modifications
A property 'storageClassName' was added to support an existent storage class.
### Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
### Motivation
zookeeper failed to start because of wrong ZOOKEEPER_SERVERS was set.
### Modifications
Changed the reference of zookeeper names by how they were created.
### Result
zookeeper started successfully and broker worked as expected.
* Helm charts for deployment on GKE
* Repackaginh helm charts under deployment/kubernetes/helm
* Formatting licences
* Removing cloud specific values to enable more generic deployments
