[1.0.X] Fixed various Oracle errata and test failures present in this branch...

[1.0.X] Fixed various Oracle errata and test failures present in this branch (including not going to 11).

Backport of Oracle-related changes from trunk in r10197.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10614 bcc190cf-cafb-0310-a4f2-bffc1f526a37