move test to avoid DST weirdness in Samoa

This should be viewed in the context of #952 and #989, but I figured I'd just submit it separately, since it's an easy one. This is a test failure from Pacific/Apia that results from them [never leaving DST in 2010](http://www.timeanddate.com/worldclock/timezone.html?n=282):

```
>> zones - same / before / after
>> Message: two moments with different offsets should be the same hour
>> Error: two moments with different offsets should be the same hour
>> at Object.exports.zones.same / before / after (test/moment/zones.js:307:14)
>> at Object.exports.zones.setUp (test/moment/zones.js:6:9)

>> zones - same / before / after
>> Message: two moments with different offsets should be the same hour
>> Error: two moments with different offsets should be the same hour
>> at Object.exports.zones.same / before / after (test/moment/zones.js:308:14)
>> at Object.exports.zones.setUp (test/moment/zones.js:6:9)
```

I just used a different year.