Performance problem with long BigInteger coerced into int, long with textual formats

[cowtowncoder]

(note: possibly belongs to jackson-core)

Beyond #2141 there is actually bigger problem that very long BigIntegers are slow to coerce/convert into other types.

One example is that Enums may be deserialized from integers, and although eventual type expected is int, integral numbers longer than maximum that fits in long (22+ digits or whatever limit is) are decoded as BigIntegers. And although bounds-checks will catch the problem eventually, turns out that performance issue is severe during processing.

So... we should catch this at lower layer, at least for textual formats.

[cowtowncoder]

Fixed for 2.9.8