[Migration operation] :migrate operation should return outcome success when migrating expressions jgroup stack in discovery group

            <discovery-group name="groupU">
                <jgroups-stack>${jgroups.stack:udp}</jgroups-stack>
                <jgroups-channel>${jgroups.channel:udp}</jgroups-channel>
            </discovery-group>

[standalone@127.0.0.1:9999 /] /subsystem=messaging:migrate
{
    "outcome" => "failed",
    "result" => {
        "migration-warnings" => [],
        "migration-error" => {
            "operation" => {
                "jgroups-stack" => expression "${jgroups.stack:udp}",
                "jgroups-channel" => expression "${jgroups.channel:udp}",
                "operation" => "add",
                "address" => [
                    ("subsystem" => "messaging-activemq"),
                    ("server" => "default"),
                    ("discovery-group" => "groupU")
                ],
                "operation-headers" => {
                    "caller-type" => "user",
                    "access-mechanism" => "NATIVE"
                }
            },
            "result" => {
                "outcome" => "failed",
                "failure-description" => "WFLYCTL0264: jgroups-stack may not be ModelType.EXPRESSION",
                "rolled-back" => true
            }
        }
    },
    "failure-description" => "WFLYMSG0081: Migration failed, see results for more details.",
    "rolled-back" => true
}