Simplified time zone support in the Oracle backend. Avoided outputtypehandler...

Simplified time zone support in the Oracle backend. Avoided outputtypehandler which doesn't exist in cx_Oracle < 4.4.1.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17171 bcc190cf-cafb-0310-a4f2-bffc1f526a37