fromCustomResourceType should be of type CustomResource?

[jorsol]

Right now CustomResourceDefinitionContext has the following method:

kubernetes-client/kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/base/CustomResourceDefinitionContext.java

Lines 110 to 112 in 367233a

	public static CustomResourceDefinitionContext fromCustomResourceType(Class<? extends HasMetadata> customResource) {
	try {
	final CustomResource instance = (CustomResource) customResource.getDeclaredConstructor().newInstance();

and it does a Cast to CustomResource... shouldn't be safer to use Class<? extends CustomResource> instead of HasMetadata? (like v1CRDFromCustomResourceType and v1beta1CRDFromCustomResourceType)

The try doesn't even catch ClassCastException so this could be potentially a problem.