NewCookieHeaderDelegate ignores "Expires" field

When RESTEASY-919 added an "Expires" case in NewCookieHeaderDelegate parsing, it forgot to pass the parsed value to the constructed NewCookie: https://github.com/resteasy/Resteasy/commit/5061d37cad9e380ef4675975e5e8f88a3b114d83?w=1#diff-41624f8c8513fdc9bc90b6c3a46959e8

The added test only checked that parsing wouldn't fail, without ever testing the parsed values: https://github.com/resteasy/Resteasy/commit/5061d37cad9e380ef4675975e5e8f88a3b114d83?w=1#diff-9eb733f44098fa75e4ff01723805d717

Also, serializing a NewCookie ignores getExpiry too.