/nodes/…/subscription

Cmdlets for /nodes/{node}/subscription and below. 4 cmdlets.

• Remove-PveNodesSubscription: DELETE /nodes/{node}/subscription
  Delete subscription key of this node.
• Get-PveNodesSubscription: GET /nodes/{node}/subscription
  Read subscription info.
• New-PveNodesSubscription: POST /nodes/{node}/subscription
  Update subscription info.
• Set-PveNodesSubscription: PUT /nodes/{node}/subscription
  Set subscription key.