message: updated login help text
diff: "properties": {
  "administratorLogin": {
  "type": "string",
  - "description": "The administrator's login name of a server. Can only be specified when the server is being created (and is required for creation)."
  + "description": "The administrator's login name of a server. Can only be specified when the server is being created (and is required for creation). The login name is required when updating password."
  },
  "administratorLoginPassword": {
  "type": "string",
  