* Update ingress api version, extension/v1beta1 will not be supported in new k8s version, this change keep backward compatibility for lower kubernetes version
* Update deprecated util Capabilities.KubeVersion.GitVersion to Capabilities.KubeVersion.Version
It remains possible to override the current release namespace by setting
the `namespace` value though this may lead to having the helm metadata
and the pulsar components in different namespaces
Fixes#66
### Motivation
Trying to deploy the chart in a namespace using the usual helm pattern fails for example
```
kubectl create ns pulsartest
helm upgrade --install pulsar -n pulsartest apache/pulsar
Error: namespaces "pulsar" not found
```
fixing that while keeping the helm metadata and the deployed objects in the same namespace requires declaring the namespace twice
```
kubectl create ns pulsartest
helm upgrade --install pulsar -n pulsartest apache/pulsar --set namespace=pulsartest
Error: namespaces "pulsar" not found
```
This is needlessly confusing for newcomers who follow the helm documentation and is contrary to helm best practices.
### Modifications
I changed the chart to use the context namespace `.Release.Namespace` by default while preserving the ability to override that by explicitly providing a namespace on the commande line, with the this modification both examples behave as expected
### Verifying this change
- [x] Make sure that the change passes the CI checks.
Fixes#50
### Motivation
The host option is not required to setup an ingress, so I made it an optional value
### Modifications
*Describe the modifications you've done.*
Made setting the host optional.
Fixes#46
### Motivation
There were some templates that relied on extra values that are deprecated.
### Modifications
Modified the checks to check for non deprecated values or deprecated values.
### Verifying this change
- [X] Make sure that the change passes the CI checks.
