Non-compliant PATCH calls

[plamenGo]

Your test suite tries to PATCH a group with the following call:

PATCH http://{{Server}}{{Port}}/{{Api}}/Groups/{{groupid}}

{
    "schemas": [
        "urn:ietf:params:scim:api:messages:2.0:PatchOp"
    ],
    "Operations": [
        {
            "name": "addMember",
            "op": "add",
            "path": "members",
            "value": [
            	{
            		"displayName":"new User",
            		"value":"{{id4}}"	
            	}
            	]
            
        }
    ]
}

However, it seems that 'displayName' should be 'display' as per https://tools.ietf.org/html/rfc7644.

This causes my endpoint to seemingly correctly output:

{
    "schemas": [
        "urn:ietf:params:scim:api:messages:2.0:Error"
    ],
    "status": 400,
    "scimType": "invalidPath",
    "detail": "invalidPath: no attribute named 'displayName' from 'members'"
}

Which in turn causes a subsequent test to fail as the user is not a member of that group.

Can you confirm this is an error, and should I open a pull request to fix?

Thanks!