Cannot create main namespace for only suffix realm

[merlos]

Realms with only a suffix start with - (f.i., '-dev') . During the installation, the installer tries to create a namespace with the name "-" (f.i., '-dev'). However given the rules for creating a namespace this is not allowed.

This namespace is created for future use, such as identification of realms, or magasin workloads.

The conditions are restricted by label names RFC 1123 (kubernetes creates a label when a new namespace is created)
https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names

• metadata.name: Invalid value: "_dev": a lowercase RFC 1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name', or '123-abc', regex used for validation is 'a-z0-9?')
• metadata.labels: Invalid value: "dev": a valid label must be an empty string or consist of alphanumeric characters, '-', '' or '.', and must start and end with an alphanumeric character (e.g. 'MyValue', or 'my_value', or '12345', regex used for validation is '(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?')

Options:

1. Do not allow the suffix only realms
2. Add some kind of prefix in the main realm name such as "m--".