Included in the metadata the externalId of the users that activated t…

[pedrobmarin]

…he recording during the meeting

getRecordings should look like this:

<recordings>
    <recording>
        <recordID>a64e2a4adcc4ae20e6e35babd2a181619cb8e224-1511284588665</recordID>
        ...
        <recordingUsers>
            <user>
                <externalUserId>345y</externalUserId>
            </user>
            <user>
                <externalUserId>345y4r34r34r</externalUserId>
            </user>
        </recordingUsers>
        ...
    </recording>
</recordings>