fixed 422 unprocessable entity -> content

    DELETE Subscriptions

    Check HTTP Response Status Code Is    405

POST Create a new Fault Management alarm subscription - Unprocessable entity

POST Create a new Fault Management alarm subscription - Unprocessable content

    [Documentation]    Test ID:8.3.3.3.17

    ...    Test title: POST Create a new fault management alarm subscription - Unprocessable entity

    ...    Test title: POST Create a new fault management alarm subscription - Unprocessable content

    ...    Test objective: The objective is to test that a new fault management alarm subscription is not created if the notification endpoint is unreachable by the NFV-MANO.

    ...    Pre-conditions: No subscription with the same filter and callbackUri exists.

    ...    Reference: clause 7.5.5.3.1 - ETSI GS NFV-SOL 009 [7] v4.4.1