Description of problem:

The realms are not readable, this is despite the access control provider being Simple: -

[domain@localhost:9999 /] :whoami(verbose=true)
{
    "outcome" => "success",
    "result" => {
        "identity" => {
            "username" => "$local",
            "realm" => "ManagementRealm"
        },
        "mapped-roles" => ["SuperUser"]
    }
}
[domain@localhost:9999 /] ./core-service=management/security-realm=ManagementRealm:read-resource
{
    "outcome" => "failed",
    "failure-description" => "JBAS014807: Management resource '[
    (\"core-service\" => \"management\"),
    (\"security-realm\" => \"ManagementRealm\")
]' not found",
    "rolled-back" => true
}