Fixed #11489 -- `GeoQuery.resolve_columns` now recognizes annotations;...

Fixed #11489 -- `GeoQuery.resolve_columns` now recognizes annotations; disabled problematic test cases on Oracle and added notes on why.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@11251 bcc190cf-cafb-0310-a4f2-bffc1f526a37