`ZonedDateTime` for times before the epoch do not serialize correctly

[cowtowncoder]

(moved from https://github.com/FasterXML/jackson-datatype-jsr310/issues/97
reported by @twilson-palantir )

Version 2.8.10

    public static void main(String[] args) throws Exception {
        ObjectMapper mapper = new ObjectMapper().registerModule(new JavaTimeModule());
        ZonedDateTime original = ZonedDateTime.parse("1959-04-13T05:05:38.599Z");
        String serialized = mapper.writeValueAsString(original);
        ZonedDateTime deserialized = mapper.readValue(serialized, ZonedDateTime.class);
        System.out.println(original);
        System.out.println(serialized);
        System.out.println(deserialized);
    }

outputs

1959-04-13T05:05:38.599Z
-338324062.599000000
1959-04-13T05:05:37.401Z[UTC]

I haven't checked other types for issues, but I wouldn't be surprised if they were similarly broken.

[cowtowncoder]

Not actually sure this is "easy" per se, but I think that investigating basic problem should be straight-forward and then it should be possible to either:

1. Add unit test to show the problem (or, if can not reproduce, close as fixed)
2. Possibly fix, OR, if more difficult than expected, add findings

and if not easily fixable, add a failing unit test (under failing package so it won't block builds)

[cowtowncoder]

Fixed via #132, duplicates #120 -- will be in 2.10.0.pr2.
Kudos to @kupci for fix!