#27: ComparatorTypes now accepts 'reversed' qualifiers. 

Changelog:
- ComparatorTypes now accept 'reversed' qualifiers for both simple and
composite types.
- Added unit tests to cover these new features.
- Added integration tests to cover these new features.

Signed-off-by: Marc CARRÉ <carre.marc@gmail.com>

URL: https://github.com/marccarre/cassandra-unit/commit/6aefd5cd3bfe53c79c6c1266b968269ed571deef