Added savepoint support to the Oracle backend, necessary per the thread at http://groups.google.com/group/django-developers/browse_thread/thread/c87cf2d97478c068/
Added savepoint support to the Oracle backend, necessary per the thread at http://groups.google.com/group/django-developers/browse_thread/thread/c87cf2d97478c068/

git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@10022 bcc190cf-cafb-0310-a4f2-bffc1f526a37

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