private boolean isOptionsMethod(HttpServletRequest httpReq) {
        return "OPTIONS".equals(httpReq.getMethod()); //$NON-NLS-1$
    }
Returns true if it's an OPTIONS http request.
@param httpReq the http servlet request
@return true if options method, else false
common/servlet/src/main/java/io/apiman/common/servlet/ApimanCorsFilter.java