public static void addACLs(String principal, AclBinding aclBinding) {
        Vector<AclBinding> aclBindings = FakeLocalMetadataStore.ALL_ACLS.getOrDefault(principal, new Vector<>());
        aclBindings.add(aclBinding);
        FakeLocalMetadataStore.ALL_ACLS.putIfAbsent(principal, aclBindings);
    }
add acls to allACLs
@param principal kafka user name
@param aclBinding {@link AclBinding}
connect/mirror/src/test/java/org/apache/kafka/connect/mirror/clients/admin/FakeLocalMetadataStore.java