edited questionnaire_data api

[rakeshateka]

{
    "data": {
        // practitioner details (who has done the assessment)
        "practitioner": {    
            "practitioner_uuid": "<string>"
        },
        // patient details (for whom the assessment is done)
        "patient": {        
            "unique_identifier": "<string>",
            "patient_uuid": "<string>",
            "age": "<integer>",
            "gender": "<m/f/o>",
        },
        // questionnaire data in fhir format.
        "fhir_data": {}     
}