Automate test for checking the pre-created namespace test flow

We need to create an autotest for verification of the Predefined namespace  for DevSpaces that implements the next scenario:

• Create  the predefined namespace like:

  kind: Namespace
  apiVersion: v1
  metadata: 
    name: devnamespacename
    labels: 
      app.kubernetes.io/part-of: che.eclipse.org
      app.kubernetes.io/component: workspaces-namespace
    annotations: 
      che.eclipse.org/username: dev 

• Apply this and ad the appropriate rights for the user that will use this:

  oc adm policy add-role-to-user edit dev

• Create an empty workspace via UI and make sure that it has been created in the Predefined namespace.