## Description

During Elasticsearch boot, users get the following message:

> license mode is [trial], currently licensed security realms are [reserved/reserved,file/default_file,native/default_native]

Even if it's technically true (and necessary), it may be confusing for end users since they may expect `[basic]` instead.

## Proposal

Avoid the message reporting the trial license, since the "correct" license level is written again later in the boot process.
x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/Realms.java
RealmSettings.RESERVED_REALM_AND_DOMAIN_NAME_PREFIX,
                realmIdentifiers.stream()
                    .map(rid -> RealmSettings.PREFIX + rid.getType() + "." + rid.getName())
                    .sorted()
                    .collect(Collectors.joining("; "))
            );
        }
    }
    @SuppressWarnings({ "unchecked", "rawtypes" })
    private static void combineMaps(Map<String, Object> mapA, Map<String, Object> mapB) {
        for (Entry<String, Object> entry : mapB.entrySet()) {
            mapA.compute(entry.getKey(), (key, value) -> {
                if (value == null) {
                    return new ArrayList<>(Collections.singletonList(entry.getValue()));
                }
                assert value instanceof List;
                ((List) value).add(entry.getValue());
                return value;
            });
        }
    }
    private static Map<String, Object> convertToMapOfLists(Map<String, Object> map) {
        Map<String, Object> converted = Maps.newMapWithExpectedSize(map.size());
        for (Entry<String, Object> entry : map.entrySet()) {
            converted.put(entry.getKey(), new ArrayList<>(Collections.singletonList(entry.getValue())));
        }
        return converted;
    }
}