Make GregorianCalendarTest consistent with our locale data.

The result of '4' is consistent with Harmony. The RI returns '1'
for this case. Consider this a non-bug difference.

Change-Id: I0ab8a1820585ba72943547cc9d03f74066970145
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

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