SCIIDDS-149: SAP extension schema cannot be recognized in path during the PATCH request

[IvayloT9]

When we put a schema in path, the API is not recognized the it:

{
    "Operations": [
        {
            "op": "replace",
            "path": "urn:ietf:params:scim:schemas:extension:sap:2.0:User:emails[value eq \"mark.johnson9@sap-test.de\"]",
            "value": [
                {
                    "value": "mark.johnson9@sap-test.de",
                    "primary": true
                }
            ]
        }
    ],
    "schemas": [
        "urn:ietf:params:scim:api:messages:2.0:PatchOp"
    ]
}

The returned error is "Attribute with name 'urn:ietf:params:scim:schemas:core:2.0:User:urn:ietf:params:scim:schemas:extension:sap:2.0:User:emails' does not exist" which is not correct.

[karaulyanovsap]

Describe in the PR request what was the payload and any errors that were returned.