CURR11 — Improve DTime exception handling

Summary: The CBOException type currently prohibits the called software from
informing the calling software as to the source of the problem that raises
a CBOException. e.g. If CBO::DTime::setSeconds(63) is called, a
CBOException will be raised, but the caller cannot query the CBOException
caught for its exception type or description as CBOException does not
currently support these constructs. In the case where many arguments are
presented to a method, the caller will not know which specific argument is
causing the problem.