[1.2.X] Fixed #14244: Allow lists of more than 1000 items to be used with the...

[1.2.X] Fixed #14244: Allow lists of more than 1000 items to be used with the 'in' lookup in Oracle, by breaking them up into groups of 1000 items and ORing them together. Thanks to rlynch for the report and initial patch. Backport of [13859] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13860 bcc190cf-cafb-0310-a4f2-bffc1f526a37