[1.2.X] Fixed #15116 -- Strip ordering clause from in_bulk() queries, since...

[1.2.X] Fixed #15116 -- Strip ordering clause from in_bulk() queries, since ordering information will be lost. Thanks to lamby for the report and patch.

Backport of r15457 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15459 bcc190cf-cafb-0310-a4f2-bffc1f526a37