convert to BigInteger when integerOnly="true" ?

[Cale Scholl]

Aloha,

convertNumber currently converts to Long when integerOnly="true"; I'd 
like to convert to BigInteger instead so that we're less likely to lose 
any precision.

There's a test in NumberConverterTestCase called 
testIntegerOnlyIsHonoured that expects Long values, so I changed it to 
expect BigInteger values instead, but I still got a test failure. Turns 
out this test case is used for both javax.faces.convert.NumberConverter 
and org.apache.myfaces.trinidad.convert.NumberConverter, so I only test 
against BigInteger values when the converter instance is the latter.

Please register any complaints with me.

Thanks,
Cale