fix paperclip.patchonly always false

[HeartPattern]

Fix paperclip.patchonly does not use system property

[kennytv]

It does, see Boolean.getBoolean documentation/implementation

[electronicboy]

    public static boolean getBoolean(String name) {
        boolean result = false;
        try {
            result = parseBoolean(System.getProperty(name));
        } catch (IllegalArgumentException | NullPointerException e) {
        }
        return result;
    }

(Kneny beat me to the close)