The TIMESTAMP type has been available in Oracle since Oracle 9i
which was released in June 2001 and contains more data than the
DATE type so it can be reliably used for the related data types.
This adds support for preserving milliseconds and the time zone
information if this is passed or in the database.
[ChangeLog][QtSql][OCI] Added support for the TIMESTAMP data type.
Task-number: QTBUG-23
Change-Id: Icf7a012dda75fb342ce6c6aa34eaa2a52755ff2d
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>