Patient/$everything without a patientId results in a Null response.

[prb112]

Describe the bug
Patient/$everything without a patientId results in a Null response.

Environment
Which version of IBM FHIR Server? 4.8.1 (any with $everything installed)

To Reproduce
Steps to reproduce the behavior:

1. Call

--header 'X-FHIR-TENANT-ID: default' \
--header 'Content-Type: application/fhir+json' \
--header 'Authorization: Basic  ' 

2. See error

{
    "resourceType": "OperationOutcome",
    "id": "c0-a8-56-16-f1ba9434-444e-4fdd-af13-8a1b74c4c70d",
    "issue": [
        {
            "severity": "fatal",
            "code": "not-found",
            "details": {
                "text": "Patient with ID 'null' does not exist."
            },
            "expression": [
                "<empty>"
            ]
        }
    ]

Expected behavior
it should respond that there is a missing input

Additional context
n/a

[lmsurpre]

I ran the GET [base]/Patient/$everything and I found the error detail to be a bit awkward, but acceptable:

{
    "resourceType": "OperationOutcome",
    "id": "7f-0-0-1-d3d8a475-aeee-4909-8dc0-21ec63715530",
    "issue": [
        {
            "severity": "fatal",
            "code": "not-supported",
            "details": {
                "text": "Search for Patients the Patient is related to is not supported"
            },
            "expression": [
                "<empty>"
            ]
        }
    ]
}