Create a label.

POST https://{hostname}:{port}
  /build/rest2/build-lives//latest/labels

This command takes a JSON request string or file. Use the following template for the request:

{
  "label": "The name of the label.",
  "labelDependencies": "Determines which dependencies to 
  which the label should also be applied. This is not 
  required. The value should be 'NONE', 'DIRECT' or 'ALL'."
}