SOL003 Adapter Package Management - Terminate/Delete Subscription

• SVNFM does not need the subscription anymore.
• SVNFM sends a request for Terminate/Delete Subscription to the SOL003 Adapter. 
• SOL003 Adapter removes the SVNFM package subscription.
• SOL003 Adapter sends the 204 No content response to SVNFM.

Precondition: SVNFM subscribed to the SOL003 Adapter for package notifications

Postcondition: SOL003 Adapter removed the SVNFM package subscription.