Unsafe kubernetes name generation

[ichbinfrog]

Kubernetes services must also follow the DNS-1035 naming convention (Cf. k8s issue and the appropriate rfc) so in order to safely generate kubernetes names (for both services, namespaces and other objects) the generated name should:

• be lowercase
• <= 253 characters
• start with an alphabetic character
• end with an alphanumeric character

So I don't think lowercasing is safe enough:

alien4cloud-kubernetes-plugin/src/main/java/org/alien4cloud/plugin/kubernetes/modifier/KubeTopologyUtils.java

Lines 104 to 109 in 0865acd

	/**
	* K8S names must be in lower case and can't contain _
	*/
	public static String generateKubeName(String candidate) {
	return candidate.toLowerCase().replaceAll("_", "-");
	}