added interconnected test case for subscription deletion test id 11.3.8

*** Settings ***

Resource          environment/variables.txt    # Generic Parameters

Resource          IC_TC_keywords.robot

Library           JSONLibrary

*** Test Cases ***

Delete individual subscription

    [Documentation]    Test ID: 11.3.7

    ...    Test title: Delete individual subscription

    ...    Test objective: The objective is to test the interconnected case of subscription resource creation and deletion

    ...    Pre-conditions: none

    ...    Reference: ETSI GS NFV-SOL 003 [1] v4.5.1

    ...    Config ID: Config_prod_NFVO, Config_prod_VNFM

    ...    Applicability: none

    ...    Post-Conditions: Subscription deleted from VNFM

    GET Individual VNF Package

    POST Create a new subscription

    GET Subscriptions

    GET Individual Subscription

    DELETE an individual subscription