[1.0.X] Fixed #11401 -- Update geographic admin to use OpenLayers 2.8 as...

[1.0.X] Fixed #11401 -- Update geographic admin to use OpenLayers 2.8 as OpenStreetMap does not support previous versions.  Thanks, yourcelf for ticket and patch.

Backport of 11125 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@11126 bcc190cf-cafb-0310-a4f2-bffc1f526a37