fix(033_01_03): correctly inject retrieved id into CSR

*** Test Cases ***

033_01_03 Create Context Source Registration Without A Sprecified ID

033_01_03 Create Context Source Registration Without Specifying an ID

    [Documentation]    Check that you can create a context source registration without specifying an ID

    [Tags]    csr-create    5_9_2

    ${payload}=    Load JSON From File    ${EXECDIR}/data/${registration_payload_file_path}

    Check Response Status Code    201    ${response.status_code}

    ${registration_id}=    Check Response Headers ID Not Empty    ${response.headers}

    Set Suite Variable    ${registration_id}

    ${registration_payload}=    Update Value To JSON    ${payload}    $..id    ${registration_id}

    ${id_dict}=    Create Dictionary    id=${registration_id}

    ${registration_payload}=    Add Object To Json    ${payload}    $    ${id_dict}

    ${response1}=    Retrieve Context Source Registration

    ...    context_source_registration_id=${registration_id}

    ...    context=${ngsild_test_suite_context}