Update FieldAdapter with Nullable/NonNull annotations. Fix code in im…#649

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lemonboston wants to merge 2 commits intomasterfrom mx/644-fieldadapter-nullability

+259-128

Commits on Jan 24, 2018

Update FieldAdapter with Nullable/NonNull annotations. Fix code in implementations where it was needed. #644
Gabor Keszthelyi
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Commits on Jan 26, 2018

Use Integer instead of Long for the binary boolean number. Add unit test.
Gabor Keszthelyi
committed