private static String getNameFromSerializedString(String nameCommaVersion) {
        String[] av = nameCommaVersion.split(",");
        return av[0];
    }
Finds the name and namespace part from a string "name.namespace,version", which
is how it is serialized in zookeeper (versions is always empty)

@param nameCommaVersion A string consisting of "name.namespace,version" or "name.namespace,"
@return a string with name.namespace
config/src/main/java/com/yahoo/vespa/config/util/ConfigUtils.java