BUG: Fix type use for uint64 in Java tests

In Java, sometimes uint64 is translated into a long while other times
it's a BigInteger. This patch add the ability to automatically convert
the test parameter to the correct type if the test's type is set to
uint64_t

Change-Id: I5256029ed1d8909b75f122b296719f8ca0c06ed1
Merge branch 'SIMPLEITK-546_FixJavaBigIntegerTests' into release

* SIMPLEITK-546_FixJavaBigIntegerTests:
  BUG: Fix type use for uint64 in Java tests

Change-Id: Iaf417a146e851ba1785c558bd922ac4cfadcb7a6