public void setSoftwareVersionData(String key, String value) {
        softwareVersionData.put(key, value);
    }
Saves given session data. Data is saved to temporary storage only and is accessible during
this session life only and only from this session instance.
@param key a <code>String</code> value of stored data key ID.
@param value a <code>String</code> value of data stored in session.
xmppserver/src/main/java/org/jivesoftware/openfire/session/LocalSession.java