Unable to create workspaces in CodeReady Workspaces

Issue

• Not able to create workspaces in CodeReady Workspaces with an error when the username contains an @ or .:

  The specified namespace user@example.com is invalid: a DNS-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]([-a-z0-9]*[a-z0-9])?')
  

• Not able to create workspaces in CodeReady Workspaces when the username contains an @ or . with error:

   The workspace would be started in a namespace/project 'user.example-com', which is not a valid namespace/project name."
  

• Not able to create workspaces in CodeReady Workspaces when the username doesn't follow the K8S objects naming convention.