Returns the official builds ordered by the start time.
     * The filter parameters specifies what builds will be returned
     *
     * @param array   $products     The product names of the builds to fetch, empty array fetch for all products
     * @param string  $productPart  Filter on product part(build or ttcn), null = all product parts
     * @param int     $hoursOld     Limits search to this many hours back
     * @param int     $limit        Max number of builds to be returned, 0 = no limit
     * @param bool    $onlyPassed   Only for internal calls, always true for external calls
     *                                  true - only return passed builds
     *                                  false - also return failed builds
     * @return matching builds in doctrine object or Json response