core-it-suite/src/test/resources/mng-3748/settings.xml

<settings>
    <unknown>
        <repository>
            <id>central</id>
            <url>http://central</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </unknown>
</settings>